Answer:
It might include things like definitions, historical context, current events that have bearing on your writing, or other information. Background information does not directly support your thesis in an essay or paper, but it is necessary for your reader to understand your thesis.
Explanation:
Because a magnet with north and south with another magnet with north and south can pull or push each other. same way with continental drift.
Answer: Even though there are smalll amounts of these gases, they can have a major effect on Earth. For example, increased amounts of carbon dioxide are having a major effect on global warming. :)