The answer is A. Fallopian Tube. The ovaries create the egg and the fallopian tubes hold the zygote until it is fertilized, then transfer it to the uterus.
It is the circulatory system and respiratory system.
Like during the winter it would be dormant because it would not be dead but it would lose its leaves to avoid death, therefore slowing down
Hope this helps
I think its D I'm not quite sure but with RNA the A changes to a U.