May explode with such intensity that they become part of other objects.

a) massive stars
b) white dwarfs c) galaxies
d) the nebula

If my memory serves me well, the answer is: A) Massive stars may explode with such intensity that they become part of other objects.

Ithink is a i believe

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city.