Pictures showing earthworm and chimpanzee, with microscope pictures

How do the structures of the animals compare?
A.
The chimpanzee's tissues form organs, while the earthworm is only made up of tissues.
B.
Both animals have intestinal tissues that are made of layers of smaller organs.
C.
The earthworm is smaller, so its intestinal tissue is made of smaller cells.
D.
Both tissues have layers and folds and are made of similar types of cells.

it will increase due to the time span

"a.) well–developed vascular system."

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.