Because, they change there ways of living
Answer:
The type of food Bob is given.
Explanation:
An independent variable in an experiment is the variable that is changed. Here, the type of food is the only thing that is changed and the amount of water, temperature and other variables were kept constant (same). Thus, the independent variable is the type of food Bob is given.
An inference is an assumption you can make about a character or setting that isn't DIRECTLY STATED.
The answer is
B) Evolution
