Decide if each of the following are biotic or abiotic factors:

Mushroom (I think biotic)

Tree (i think biotic)

Dirt (I think abiotic)

Grapes (I think abiotic)

Grass( i think biotic)

Paper (I think abiotic)

Steak (I think abiotic)

Coral (I think biotic)

Athlete's foot (I think abiotic)

salad (I think abiotic)

mold (I think biotic)