I just took a test in school today. What question was I asked?

Question I was asked: Which part of the electromagnetic spectrum can humans sense without using equipment or technology?

I just took a test in school today. What question was I asked?

Question I was asked: Which change is most likely caused by a thunderstorm?

I just took a test in school today. What question was I asked?

Question I was asked:
A team of surveyors takes measurements of ground altitude at horizontal intervals of 1 meter over a 400 square meter area. These measurements can best be used to produce which representation of the area?