Answer:
Abiotic- Non-living (water, temperature, rocks)
Explanation: If you want the test version
Which is an abiotic component of a marine ecosystem? (3 points)
a. Coral in a coral reef
b. Detritus on the bottom of the ocean (detritus in considered biotic because it was once living)
c. Fish in the water column
d. Sand on the ocean floor (correct answer)
