Please someone help me with my Biology questions. PLEASE

Ryan rears sheep for their wool. recently the quantity of wool that ryan gets has diminished. this is because the new sheep are not that wooly. ryan should add which nutrient to their feed so that the sheep becomes more wooly? a.cornb.ironc.cottonseedd. vitamin a

Variety of living organisms; includes genetic, species, and ecological types.

How many types of rock can form from the rock cycle