The best soil for most plants for optimum growth is a rich, sandy loam. Loam is an even mixture of the three main types of soil. In most cases, you will need to amend your soil with compost.
 
        
             
        
        
        
Answer:
Option A, Competition has restricted the ranges of both species
Explanation:
When two species which depend on the exactly same kind of resources, get into a mode where they prefer to stay in two different ecosystems without interfering each other’s circle and thus they get excluded from each other due to competition. This phenomenon of the ecosystem is called Competitive exclusion
According to Gause's Law of competitive exclusion two species which are competing for similar kind of resources are unable to stay together.  
Hence, option A is the correct choice.
 
        
                    
             
        
        
        
Answer:
Answer is <u>A</u>
Explanation:
This is because light energy is needed for plants to carry out photosynthesis. When plants photosynthesize, they absorb carbon dioxide gas and give out oxygen gas.