a. heat. this is because, obviously, it gives off light which us see and heat because after a while, the light bulb starts to heat up and produce heat.
you can't see heat from a stove or electric in a wire and chemical energy well you can't see the actual chemical compound of something can you but you can see actual light coming from the sun or a light bulb. and for proof just search light energy and it tells you directly.
a.224/96 rn i think i'm right if i'm wrong i'm srry