Im confused on this question. ''In conclusion, Bill Nye states the "As more and more species disappeared, it is harder and harder to keep an ecosystem in balance because we don't know what?''. I have no idea what the answer is please help

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen

Which was not a reason why canals were built in florida