Which describe reflection check all that apply

Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.

Which component of the earth’s atmosphere is decreased due to photosynthesis?

What is the difference between mass density and weight density?