Question

Which object is visible only by reflection?

Answer 1

b. earth's moon  is the only object out of the four that is visible only by reflection.

The sun is a source of heat and light.

Although the moon can be seen at night and seems to glow, it is only reflecting light emitted from the sun.

A candle flame, similar to the sun, is a source of light and heat.

A bolt of lightning also emits light, so it is not the correct answer.

Answer 2

B. Earths Moon is the answer.

Hope it helped!