<u><em>Answer:</em></u>
<u><em>A is correct</em></u>
<u><em>Explanation:</em></u>
<u><em>Mutualism is an interaction where all individuals give profit from the relationship.</em></u>
An experiment can be used
A large class of molecules is called a macromolecule.
Answer: Louis Pasteur
Louis Pasteur in 1860s, proposed germ theory. The theory was based upon the fact that diseases are caused by the microorganisms.
He was officially the first to publish his work.
Grass>rabbit>snake
Grass>gazelle>lion
acorn>squirrel>owl