High- and low-pressure areas leading to air movement happen when there are differences in: a. density b. clouds c. precipitation d. atmosphere

A. density.

High- and low-pressure areas leading to air movement happen when there are differences in density.

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.