1. Infinitive of purpose: "to show off a bit," "to impress others," and "to boost their social status" all use the infinitive form to explain the reasons behind the action, which is a common and effective structure in spoken English.
2. Present simple tense: The answer uses the present simple tense throughout ("taking photos is...", "They like to post...", "It gives them...") to talk about general habits and reasons, which is appropriate for this type of question.
3. Relative clause: "pictures from famous landmarks or exotic destinations" uses a prepositional phrase to add detail, making the answer more descriptive and natural.
4. Pronoun reference: "It gives them a sense of pride to show they've been to these amazing places" uses "it" to refer back to the act of posting photos, showing good cohesion in the answer.