(B) tendencies this is an individuals natural characteristics or behaviors.
A.the intensity of the activity
A fertilized egg, or zygote, takes about five days to reach the uterus from the uterine tube. As it moves, the zygote divides and develops into a blastocyst, with an inner mass of cells and a protective outer ring. The blastocyst attaches to the wall of the uterus and gradually implants itself into the uterine lining.
What is the question? i don't understand what's being asked.
The correct answer would be D!
