The land in Mexico City is subsiding over time. What is the primary cause of this problem? A.
too many dams being built along rivers
B.
deforestation caused by cutting down trees
C.
too many buildings being constructed
D.
underground aquifers being overpumped

D.

Step-by-step explanation:

Water is continually pumped out of underground aquifers to prevent flooding and to provide drinking water. This makes the soil compact, causing the city to sink.

The correct answer would be angiosperm plants.

Double fertilization is an event that exclusively takes place in angiosperms and is completely absent in gymnosperms.

During this event, two male gametes are released in the cytoplasm of the synergid. One male gamete fuses with the nucleus of the egg cell in order to form a zygote and other male gamete fuses with the polar nuclei and produce triploid primary endosperm nucleus (PEN).