Please help with this! I will mark brainliest! Please explain how you got it

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?