Question

choose the correct answer. what is one of the characteristics of the troposphere? low air pressure high density of air molecules presence of the ozone layer

Explanation:

1. Analyze "low air pressure": The troposphere has higher air pressure near the surface (decreases with altitude), so "low air pressure" is incorrect.
2. Analyze "high density of air molecules": The troposphere is the lowest atmospheric layer, where air molecules are most concentrated (density is highest here compared to upper layers), so this is a correct characteristic.
3. Analyze "presence of the ozone layer": The ozone layer is in the stratosphere, not the troposphere, so this is incorrect.

Answer:

B. high density of air molecules