In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Question: Allen is riding his bike on a path. The course ends up 1000 feet lower above sea level compared to the beginning. At which point is the air resistance lower? 
 Answer: at the beginning
At higher elevations, there is less air to press on a given area.

Question: Eric is looking at the shortest electromagnetic wave he has seen today. This wave has the _____ frequency of the day. 
 Answer: highest
Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies.

Question: If Milo's bike chain is not moving well and he adds no oil to it, what will happen to the levels of friction the chain experiences? 
 Answer: increase

To reduce friction, oil is added to the engine.