The top right one makes the most sense.
A star system is a group of two or more stars that are held together by gravity. Astronomers have determined that more than half of all stars are members of star systems. A star system with two stars is called a binary star. The two stars orbit each other, held together by gravity.
Answer :B,D,E this is the answer to your question
According to a source, it is a present progressive tense. The present progressive tense is a verb tense that means the action is continuing or in the act right now. “To be” verb is mainly used to indicate and identify this verb tense present and the applying –ing of the present participle of the verb word used in the sentence. Hence based on the given sentence above we can apply the present progressive tense as:
For example:
<span>The journalism staff is typing the yearbook copy, but another company is printing the book.</span>
