Answer:
D. number of individuals in a species
The answer to your question is A

A solar eclipse occurs when the Moon is between the Earth and the Sun.
The Moon casts a shadow over the Earth, fully or partially blocking out sunlight.
Because of how the Moon is positioned at these times, solar eclipses only occur during the new moon phase. However, not every new moon comes with a solar eclipse.
After the egg drops it travels to the Fallopian tube , where there is a 24 hour period for fertilization , then if it is fertilized it travels to the uterus attaches to the wall and grows for nine months.. Then boom! theres a baby