The answer to ur question is a
I'm pretty sure it's high density as a solid.
The fertilized egg begins a rapid descent to the uterus. The period of rest in the tube appears to be necessary for full development of the fertilized egg and for the uterus to prepare to receive theegg. ... At the end of this transition period, the embryo becomes a mass of very organized cells, called a blastocyst.
Average temperature and average precipitation
The answer is D . Would you like me to explain ?