"I have a habit of running and listening to music at the same time."
Should 我的习惯是一边跑步，一边听音乐 also work? I don't really understand how 习惯 is being used in the correct answer. Is it an adverb? I habitually run and listen to music at the same time? Or is it a noun like in my sentence but the 的 and 是 can be dropped?