Why was the Soviet Union so interested in Afghanistan

In 1979, in the midst of the Cold War, the Soviet 40th Army invaded Afghanistan in order to prop up the communist government of the People's Democratic Party of Afghanistan (PDPA) against a growing insurgency. The Soviet Union feared the loss of its communist proxy in Afghanistan.

Explanation:

i hope this helps:)

it would be d). more resources must be obtained to attain that combination of goods and services

answer; (true);