In coral reefs, the relationship exhibited by coral polyps and single-celled algae in which both benefit is known as: select one: mutualism parasitism interspecific competition commensalism predation

abu bakr, was a senior companion and—through his daughter aisha—a father-in-law of the islamic prophet muhammad. abu bakr became the first openly declared muslim outside muhammad's family. abu bakr served as a trusted advisor to muhammad.

it should be d or b but i'm sure it's d