Population (ecology) definition ?

I’m stuck on this question cuz i’m stupid sksksksk

What evidence did mendel find that supported his law of independent assortment? a. some traits are controlled by several different genes. b. a trait can be passed on from a parent to an offspring. c. most traits have a dominant form and a recessive form. d. different traits are passed on independently of each other.

In each transformation of energy , some energy what?