Someone answer this for !

vaccines contain either killed or weakened pathogens that stimulate an immune response when they enter the body. which of the following describes the purpose of a vaccine?

a. to make macrophages that will digest an antigen

b. to cause the production of antibodies that will tag ana antigen

c. to raise the internal temperature of the body to guard against an antigen

d. to speed up the inflammatory response to prevent the movement of an antigen

Why is excretion necessary to maintain homeostasis?

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?