Hey there!
I do believe that your answer will be choice A
These are best described as the members of the milk and milk products.
Dairy products or milk products are a type of food produced from or containing the milk of mammals, especially cattle, water buffaloes, goats, sheep, camels, and humans. Dairy products include food items such as yogurt, cheese, and butter.
There is only species of a koala but you can ask how many races there are.
The name is, "phascolarctos cinereus".<span />
<span> All the millions of different proteins in living things are formed by the bonding of only </span>20 amino acids<span> to make up long polymer chains.</span>