Which is an abiotic factor in a marine ecosystem?

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)

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?