Each main idea should be supported by two pieces of proof or evidence. However, this may vary per teacher and sometimes they may want three pieces of evidence. Most of the time though the standard answer is two.
Answer:
Because extraterrestrial life may exist astronauts when they come home, have to go through a certain quarantine process. Completing this process will to make sure there isn't something called the "back contamination" which is a germ of sorts that can be the cause of diseases we aren't used too. Then because of incubation period the safety protocols were very strict. Since how astronauts don't have anything to do with planet exploration and machines like rovers do, black contamination is really a problem. Sterilization of samples brought back was also in question but because astronauts don't bring anything like that back they do not have to worry about it.
Explanation:
Remember to summarize something is too give the important details of that something. In this case you read the source and take the most important details of that source into a four to five sentence summary which you have then summarized.
Hope this helps.
A. Crusoe wants freedom, so he leaves his parents' house, but then he's forced to be a slave to a ship captain.
