What is the controlling idea?

Many people seeking to lose weight eliminate carbohydrates from their diets.
Carbohydrates’ bad reputation ignores the benefits they can offer.
There are many dishes that pair healthy vegetables with pasta.
Athletes must increase their carbohydrate intake to improve performance.

- "when these words are put together to convey a meaning it is known as a sentence. a sentence is a group of words that makes complete sense. placing of words in a sentence is very important. the second sentence is a question."

this is what i put and it was correct

it's a way for authors to communicate with reader in this time period. books from the past can teach us about life.

what passage are you referring to