Answer:
variables
Explanation:
Studying one trait at a time ensures that multiple variables are not changing simultaneously.
Some animals eat veggies some eat meat, some eat both. There is also the fact that the larger the animal is the more it has to eat to get the same nutrients. Like how the lower you are on the food chain the less you have to eat but the higher you get the more you have to eat.
I believe that the answer is B
The Answer is C. Pathogens
Plz mark brainlest!!
Cell theory because one of the rules is that all cells comes from already existing cells or something
