How can the two independent clauses below be combined to form a correct complete sentence?

If you were writing a descriptive paragraph about your favorite food and used compound adjectives, what piece ofpunctuation could be effective for describing the food? semicolonhyphencolondash

What point is the author trying to make by comparing the travel times of the first transcontinental railroad and the first transcontinental flight?

Which piece of information about doris lessing would more likely be found in the new york times article "doris lessing wins nobel prize in literature" than in the "doris lessing" biographical video? the opinion lessing has of the current political climate in south africa description of the home which lessing and her husband live in today