The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. it is a good approximation to assume that the emissivity e is equal to 1 for these surfaces.

answer; /// the above statement is (true);

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.