Answer:
natural selection as well as the connection between form and function
Explanation:
Based on the information provided within the question it can be said that this illustrates the result of natural selection as well as the connection between form and function. Because the animals that managed to form these specific teeth in order to eat the correct food that was available to them, managed to survive and continue reproducing until future generations only had this new adapted form of teeth.
Out of the choices given, the one that would most likely be studied by an anthropologist is the formation of the first languages that were developed. An anthropologist is a person who studies the human civilization, past and present. The correct answer is B.