Everything would build up and overflow
        
                    
             
        
        
        
Answer:
2. Hip bones
Explanation:
More than 40 million years ago, whales had ancestors who walked on land. Even now, they have a feature they inherited from them - hip bones. Scientists used to think that they are vestigial, i.e. that they lost their function. However, recently they discovered that these bones help whales (and other marine mammals who have them, such as dolphins) maneuver better mating.
Whales developed the rest of the listed features later, when they became marine animals. This is why they are incorrect.
 
        
             
        
        
        
Answer:
C. Under the age of 20
Explanation:
Look at the graph and find what letter the male's bar is larger than the female's. You can see that it's letter B. Then, look at the legend and find what ages lay under letter B. It is C., under the age of 20.
Please mark me as Brainliest; I need it to move onto the next level! =)
 
        
             
        
        
        
D is the answer. A gene is a part of a chromosome.
        
             
        
        
        
answer: country grasslands, African trees, and African Savannah.
or just like more dry  lands.