a type of algae grows on a sloth. what must be true for the algae and the sloth to have a commensal relationship? a. the sloth m
ust be helped by the algae in some way. b. neither the algae nor the sloth can benefit from the relationship. c. the sloth can neither be harmed nor helped by the algae. d. the algae must be harming the sloth in some way.
energy generated in ways that do not deplete natural resources or harm the environment, especially by avoiding the use of fossil fuels and nuclear power.
