Answer:
Option D.
Explanation:
Mars is far from the Sun (less warmth from the Sun) and very little greenhouse warming due to its very thin atmosphere, is the right answer.
As the earth is distant from the sun so as the heat of the sun does not reach to mars. Another important reason why the climate on Mars is cold is that barren planet also has a shallow atmosphere that is 95% carbon dioxide. The distribution of Mars’ climate is remarkably comparable to Venus’, one of the least congenial atmospheres in all of the Solar System. 
 
        
             
        
        
        
Answer:
The scientists believe that they arose in Africa and spread to the rest of the world.
Explanation:
A is not correct because the Homo sapiens is not the earliest ancestor of moern humans, but it is the latest.
B is not correct because such evidence is lacking, and even though the Homo sapiens mixed with other hominids in Eurasia and sub-Saharan Africa, they were not of the same species.
C is correct because the evidence suggests for now that the Homo sapiens arose in Africa, and through several migration waves spread out on the other continents.
D is not correct because the Homo sapiens has not been replaced by any other species, as they are the species nowadays known as humans.
 
        
             
        
        
        
The position on earth's surface directly above the earthquake source is called the epicenter.
        
             
        
        
        
Answer:
formed by lava flows of low viscosity - lava that flows easily. Consequently, a volcanic mountain having a broad profile is built up over time by flow after flow of relatively fluid basaltic lava issuing from vents or fissures on the surface of the volcano.
Explanation:
 
        
             
        
        
        
Increase
Explanation:
The discharge of a river traveling through a temperate region will typically increase downstream. For arid regions, the discharge decreases downstream. 
- Discharge is the volume of water of a river that flows through a point per seconds. 
- In a temperate region, as a river flows downstream, more bodies of water from different sources joins together with it. 
- Rivers generally tend to flow into natural basins which are located downstream. 
- These basins are located at very low elevation. 
- As more bodies of water collects together, the volume of the water will increase and so is the discharge too. 
Learn more: 
Downstream brainly.com/question/2286502
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