He should include anaerobic exercise in his fitness program.
Answer: embryo
Explanation:
An embryo is the early stage of the development of the diploid cell called as zygote. It is formed by the continuous cell division and differentiation of the zygote. It is the unborn offspring which is in the state of development. In humans the embryonic state remains from second to eighth week after the process of fertilization. After eighth week the embryo is called as fetus.
According to the given situation, the six weeks of pregnancy is indicative of embryonic state.
I believe it’s either c or d but it’s most likely D since the main job of the system is two supply the body with nutrients
