Answer:
Expiratory reserve volume 
 
        
             
        
        
        
All of the answers would be correct,
hope this helped!! <span />
        
                    
             
        
        
        
Answer:
Chlamydomonas containsingle-cell green alga to carry the procces of photosntesis 
Explanation:
 
        
             
        
        
        
Answer:
A. Obligate
Explanation:
An obligate relationship is one where both organisms are interdependent with one another in a way that one cannot survive without the other.
A parasitic relationship is where one organism benefits, and the other is harmed. 
A mutualistic relationship is one where both organisms "work together," therefore benefiting one another. 
A facultative relationship is where both species benefit off of one another, but are not fully dependent on one another to the point they cannot survive without their symbotic partner. 
 
        
                    
             
        
        
        
Why are ecosystems with grass better for herbivores than ecosystems with trees?
Trees cannot store a lot of energy in the leaves, so grass would be better.