I would assume that the early stages of pregnancy are most crucial for the development of the foetus. This would generally be the development of vital body parts such as the brain and we know a dud brain is a birth defect. In the late stages, pretty much everything that is vital for survival is fully developed.
hope this helps
George is running a 5-km race and his cells need more oxygen. The change that will help his body meet the increased demand for oxygen is his heart will start beating more quickly. This helps the oxygen get ferried throughout the system faster. The correct answer is A.
Hangovers are the bodies adverse reaction to introducing an excessive amount of toxic substance into the system
Answer:
It is dangerous to swim alone when you don't know swimming. Because there should be someone to save you.
its considered a muscular exercise