1.Comparative structure: "more beneficial" is used to compare the benefits of having a few close friends versus many casual friends, demonstrating the ability to express complex ideas.
2.Relative clause: "which are crucial for emotional support and trust" uses a relative clause to provide additional information about "deep and meaningful relationships," adding depth to the sentence.
3.Present simple tense: The use of present simple tense throughout the answer, such as "allow" and "contribute," indicates general truths and habitual actions, showcasing a clear understanding of tense usage.
4.Phrasal verb: "lean on" is a phrasal verb used in "lean on their close friends for support," demonstrating the ability to use idiomatic expressions effectively.