Hello there, As from what I can recall, I can remember 4 concerns regarding nuclear energy 1) Storing radioactive waste 2) Safety 3) Weapons proliferation and terrorism 4) Health
Embryonic development involves process of formation and development of an embryo. In humans, during the early stages, 10 weeks of embryonic development, all the major body organs are formed.
I've looked us up ever since you posted it the only thing I can come up with is letter A because it talks a lot about Mountain chains that talks a lot about the ocean floor and the Hawaiian stuff so try a
