Answer:
Your answer will be D. Protista.
The Earth can be divided into four main layers: the solid crust on the outside, the mantle, the outer core and the inner core. Out of them, the mantle is the thickest layer, while the crust is the thinnest layer.
hope this helps!
(:
In Biology you study living organisms, so that would include plants and animals.
Based on Dominance for a heterozygous cross 75% of the offspring would have the dominant phenotype For a homozygous cross it would 100%.