They are different because one is stronger than the other
        
             
        
        
        
Answer
            The correct option is B.
Explanation
           Ecological succession of any species is composed of following stages:
A. Migration
             The movement of species from one place to another location for the purpose of setting permanently o temporary is known as migration
. Forexample
              Siberian crane (<em>Leucogeranus leucogeranus</em>) that live in the arctic tundra of eastern and western Russia. The eastern population of birds migrate to china while western population of these birds migrate to Iran, India and Nepal during winter season.
B. Ecesis
          The complete establishment of species in new habitat that was completely barren or left barren due to some catastrophe is known as Ecesion. This process is dependent upon the climatic, edaphic and biotic factors. The success of plant depend upon some of the adaptations to withstand the unfavorable conditions which includes both biotic and abiotic conditions.
Forexample
                The process of succession in xerosphere start on barren area from pioneer stage covered by crustose lichen, then foliose lichen followed by moss stage, herbaceous stage and a last by shrub stage.
C. Nudation
        The initiation of new species by major environmental disturbance such as volcano eruption is known as Nudation.
D. Reaction
             It represents the effect of established species on the habitat. Forexample plants alter habitat condition as they grow. They extract raw materials from the environment in large amounts and return metabolic wastes. The waste accumulates in large amounts and differ from the original raw materials, thus altering the environment.  
E. Competition
              The phenomenon which involves struggle for existence between two or more individuals growing in same area, that make excessive demand that are similar in nature on the soil is known as competition.
Such struggle may be in between same species or different species. The competition may be interspecific or intraspecific. Because of completion the weak individuals are eliminated as strong ones are retained.
  
 
        
             
        
        
        
the answer D. Giant impact hypothesis or large impact hypothesis
The origin of the Moon refers to several explanations regarding the formation process of the Moon, Earth's natural satellite. Theory The large collision hypothesis is the best-known theory regarding the origin of the moon.
<h2>Further explanation
</h2>
The big collision hypothesis theory states that the Moon was formed from debris left over from a collision between Earth and an object the size of the planet Mars, about 4.5 billion years ago. The object that crashed into the Earth is often called Theia taken from the Greek Titan myth, which is the mother of Selene, the goddess of the Moon.
Other hypotheses about the origin of the moon:
- Catching Hypothesis. This hypothesis says that the Moon is an object captured by the Earth.
- Cleavage Hypothesis. This hypothesis says, in the old days, the Earth was spinning very quickly throwing some of its mass.
- Accretion Hypothesis. This hypothesis says that the Earth and the Moon formed at the same time as a double system of ancient accretion disks in the Solar System.
- The Georeactor Explosion Hypothesis. Another more radical hypothesis was published in 2010, saying that the Moon might have been created by a georeactor explosion located along the boundary of the mantle's core in the rapidly rotating equatorial plane of the Earth. This hypothesis can explain the similarity of the composition of the Earth and the Moon.
Learn more
- about the hypothesis of the creation of the moon brainly.com/question/12687557
- about the big collision hypothesis brainly.com/question/12687557
Details
Class: Middle School
Subject: Biology
Keywords: Hypothesis, Moon, Big Collision Hypothesis
 
        
                    
             
        
        
        
C is the answer I just check it on mine