In a human female reproductive system, the OUTER FEATURES ARE COLLECTIVELY CALLED THE VULVA. The vulva is the external anatomical structure of the female reproductive system. The opening of the female urethra is also located at the vulva, thus, the vulva also helps in urination in female.
Glassy igneous rocks (i.e. obsidian) are cooled very rapidly.
I believe that its B but could also be D
Answer:
The Stiffer Mantle is 930 miles into the Earth. It is 123,000 miles deep.
Explanation: