What clause should always be separated from the rest of the sentence by commas

Danny went for a long bike ride he covered at least forty miles

The essay sea stars by barbara hurd. what point is the author making by comparing a sea star missing an arm to a human losing a limb?

Which two types of poetry focus on the poet's experiences? a. sonnet and tanka b. tanka and haiku c. haiku and lyric poetry d. lyric poetry and sonnet