Describe how a plant meets the basic challenges of life

Ineed to know why d is the correct answer asap

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.