Read the excerpt from an informative essay.

In a military dictatorship, the armed forces control the government, and the head of state is often the leader of the country’s military. Typically, this leader has seized control of the government by force. On the other hand, a single-party dictatorship is run by a group of people. This group often includes politicians who do not belong to the military.

Which essay structure does this paragraph use?

definition
description
cause-effect
compare-contrast