The cliff is popularly known for … morning beauty.

Analyze the question: The gap comes before the noun "morning beauty," so we need a word that shows possession: the beauty belongs to the cliff. That calls for a possessive determiner.

Explain the concept: "Its" vs "It's"

• Its (no apostrophe) is the possessive form of "it," like his, her, their. It shows ownership.
• It's (with apostrophe) is a contraction of "it is" or "it has."
• Its' does not exist in English.
• It alone is a pronoun, not a possessive, so it cannot modify "beauty."

Step-by-step solution:

1. Test each option in the sentence. • A. "known for it morning beauty": ungrammatical, because "it" cannot modify a noun. • B. "known for it's morning beauty": this means "known for it is morning beauty," which makes no sense. • C. "known for its' morning beauty": this form is not valid. • D. "known for its morning beauty": correct, meaning the morning beauty belongs to the cliff.
2. Only option D is grammatically correct and fits the meaning.

Correct sentence: The cliff is popularly known for its morning beauty.

Tip: Expand "it's" into "it is" or "it has." If the sentence doesn't make sense, use its. Also remember that possessive pronouns (his, hers, ours, theirs, its) never take an apostrophe.