Confused if it was option b or c. quick science q. plz.

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

List five ways we are indebted to phytoplankton

Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked