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

Answer;

A. density.

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

Explanation;Atmospheric pressure or air pressure is the force exerted by air above a surface as gravity pulls it to Earth.Air pressure decreases with an increase in altitude. Atmospheric pressure is measured using a barometer and is an important indicator of weather.When a low-pressure system moves into an area, it causes cloudiness, wind, and precipitation. High pressure systems on the other hand causes a fair, calm weather.

If it releases 5 tons a day and there are 7 days a take that answer and multiply by 5 percent (0.05) to find the amount released in one week. leave a comment if you need more .