What has been a consequence of human economic development in advancing nations? a. subsistence farming b. conservation c. photosynthesis d. pollution

D. pollution

Explanation:

Pollution is the consequence of the human economic development of advanced nations. Pollution is defined as the undesirable change in the earth surface, there are different types of pollution which is common in developed nations such as air, water, soil pollution and so on. But advanced nations uses the technology to control and reduce the pollution. Photosynthesis is the natural process performed by the plants. Subsistence farming is the activity of under developed and developing nation.

an angle + its complement = 90 degrees

(4,-2)

explanation:

6x+4y=16

-6x-9y=-6

-5y=10

y=-2

x=4