B is the answer to your question.
I hope this helped!
The major function of the immune system is to protect the host from environmental agents such as microbes or chemicals, thereby preserving the integrity of the body. This is done by the recognition of self and response to non-self.
The invention of the microscope allowed the first view of cells. English physicist and microscopist Robert Hooke (1635–1702) first described cells in 1665. He made thin slices of cork and likened the boxy partitions he observed to the cells (small rooms) in a monastery.
Humans, chimpanzees, gorillas, and orangutans are all part of the family of organisms called Hominidae. So monkeys would be your best bet.
Nuts and bolts in any construction activity
