Answer
e
Work Step by Step
a is incorrect. Just because the services provided to us are unseen does not mean they are not valuable. c is incorrect because the services that ecosystems provide for us come from their biodiversity. This is why we should be more knowledgeable about them and protect them, so d is correct. We normally take their services for granted, so b is correct, since when they are functional their services are unseen, so b is correct
