Question Which of the following is the MOST appropriate sentence to begin a formal acadernic essay about the
discovery of gravitational waves?
A binary star system is made of two stars, which both orbit around a shared barycenter.
Another important concept for understanding gravitational waves is that of angular momenturn.
O A major breakthrough was announced in 2016, when scientists reported they had heard and recorded
gravitational waves for the first time.
But even Einstein, who had some idea about gravitational waves, wasn't totally sure they were even real.

the 3rd one

Explanation:

when starting any essay, its good to have a hook, something to get the reader relatively interested in what you are writing. The hook in this case is the 3rd one since it talks about gravitational waves which means it stays on topic and it provides a recent discovered breakthrough which can make the reader interested.

A binary star system is made of two stars, which both orbit around a shared barycenter.

Explanation:

hmm, sadly there is no dialogue. there is no place in the story where he is talking to anyone. it's more of just describing what he eats and where he sleeps. you have to become anne frank, give details of where you are, what other folks look like, how the environment is. have a little bit of dialogue tell of what people are specifically saying. anne frank talked about her entire household including the people, the objects, the lighting, the food they ate, and even the smell in the air. there has to be more to your diary entries, the whole story in its current state is only about peter van daan, the food, the sounds, and where he sleeps. also he seems to be writing only once a year yet more than that happened from day to day. for a friend, i can you write it out, if you want.

first, you have to go to settings, click on your profile, go to profile settings, and you'll find the setting there.