Which of the following reflects radio waves back to the Earth?

Which of the following reflects radio waves back to the Earth? Correct Answer Ionosphere

Ionosphere reflects radio waves back to the Earth. The low-frequency end of the window is limited by signals being reflected by the ionosphere back into space, while the upper limit is caused by absorption of the radio waves by water vapor and carbon dioxide in the atmosphere. The ionized part of the Earth's atmosphere is known as the ionosphere.
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Related Questions

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পৃথিবী পৃষ্ঠে একটি ইটের ওজন 81 N. পৃথিবীর অর্ধেক বাসার্ধের সমান উচ্চতায় এবং অর্ধেক বাসার্ধের সমান গভীরতায় ইউটির উপরে পৃথিবীর অভিকর্ষ বলের মান কত হবে?(A brick weighs 81 N on the surface of the earth. What are the earth's gravitational forces act on it at a height of half of the radius of the earth and at a depth of half of the radius of earth, respectively?)
Which layer of atmosphere does reflect radio-wave from the earth back into space?
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The manager of a radio program is going to feature six vocalists--M,N,P,Q,R and S on her half hour radio show during the course of one week.She will feature one vocalist on the show each day from Monday through Saturday.The manager must schedule the vocalists for the show according to the following conditions: *M must be featured earlier in the week than R. *P must be featured on Tuesday. * Q must be featured on the day immediately before or immediately after the day on which N is featured. If N is to be featured on Thursday, the earliest day on which R can featured is ---
The manager of a radio program is going to feature six vocalists--M,N,P,Q,R and S on her half hour radio show during the course of one week.She will feature one vocalist on the show each day from Monday through Saturday.The manager must schedule the vocalists for the show according to the following conditions: *M must be featured earlier in the week than R. *P must be featured on Tuesday. * Q must be featured on the day immediately before or immediately after the day on which N is featured. If Q is to be featured on Thursday, the latest day on which M can featured is ---