Question

identify which of the statements about dark matter are true.
dark matter is dark because it is made of very faint gas and dust.
dark matter does not emit electromagnetic radiation.
dark matter has no effect on ordinary matter.
dark matter emits light that is much less energetic than visible light.
dark matter can only be detected by its gravitational effects.

Explanation:

Dark matter does not emit, absorb, or reflect electromagnetic radiation. It only interacts with ordinary matter through gravity. It is not made of faint gas and dust, and it does have a gravitational effect on ordinary matter. It does not emit light.

Answer:

Dark matter does not emit electromagnetic radiation.
Dark matter can only be detected by its gravitational effects.