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Bot GPT 4-o mini The three correct answers regarding what supernova remnants and planetary nebulae have in common are:
1. They contribute matter to interstellar space.
2. They emit non-visible radiation.
3. They are composed of matter from dying stars.
Note: While they are diffuse, this characteristic is not universally applicable to both types of structures, hence it's not selected as a commonality. They are also not exclusively composed of hydrogen and helium, as planetary nebulae can contain a variety of other elements formed during nuclear fusion in the dying star.