Which of the following pairs of ideas could be combined into a compound sentence

racism is the belief in the superiority of one race over another, which often results in discrimination and prejudice towards people based on their race or ethnicity. the use of the term "racism" does not easily fall under a single definition.

explanation:

it depends on the natural disaster. a good one you can choose are hurricanes. water vapor is the "gas" and warm fronts are the "spark". because of the global warming that humans have caused with green house gases, hurricanes have become more frequent and stronger, making them more dangerous.