Question

some objects in space are created from clouds of gas and dust. what will happen if the cloud does not have enough mass? a core will form. a star will not form. a protostar will form. a nebula will not form.

Explanation:

A star forms when a cloud of gas and dust (a nebula) has enough mass for gravity to compress it, heat it up, and start nuclear fusion. If the cloud doesn't have enough mass, nuclear fusion won't start, so a star won't form. A core (Option A) and protostar (Option C) are stages in star - formation which require sufficient mass. A nebula (Option D) is the initial cloud of gas and dust, so it already exists.

Answer:

B. A star will not form.