When two different tones blend so well when sounded together that they almost seem to merge into one tone, the interval is called a(n)?

Ithink he answer is prolly a

Studying history is very important so that we learn from past experiences and don't repeat the bad ideas/choices that might have been made. it can tell us how cultures conducted their lives and you can learn about interesting facts you might not know. hope this ! : )

Answerglass