<span>Simple diffusion and facilitated diffusion both allow molecules to cross the cell membrane without any expenditure of energy by the cell. </span>
Extra words in a sentence that add detail and are set off by commas are called nonessential elements. This is because they are not essential to the sentence and story, they are simply an added bonus, without them the sentence still makes sense.
Explanation:
is there a question or an image because I can't see any
Answer:
B. Which
It is the answer to the question
The museum trip, which was a lot of fun, taught the students all about dinosaurs.
Animal wild life is the main purpose of this text