CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION THANK YOU!! (Explain how you got the answer)

What is the following best defines climate?

If your blood becomes too concentrated with iona, what will happen to the red blood cells

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed