a. they serve as a measurement of the overall health of the habitat
b. once they become extinct, the niches they occupied are never filled again
c. other species may depend upon interactions with the endangered species
d. a and c only
I’m thinking the answer is D.
Thanks! 🙂
i think so to!
a. because they once existed in that habitat perfectly fine, otherwise they wouldn’t be there, so something must have changed for them to die off
b. once there is a niche, something will replace it so no
c. symbiosis is a powerful concept
Good Job!