Answer:

Artificial

. fireworks

.stop light

.laser

.flashlight

natural

.sun

. firefly

.stars

.magma

. lightning

.

Answer:

natural light can helps our bodies produce a vitamin D and it can use by energy of our body and it's good by the plants.

artificial light can negatively effect the health of the human and it's good by the plants but the natural sunlight was better than artificial