1. Present simple tense: The answer uses the present simple tense throughout (e.g. "places are laid out differently," "they serve different functions"), which is appropriate for stating general facts and reasons.
2. Passive voice: "A school is designed with..." and "a hospital has..." use the passive voice to focus on the design rather than the designer, which is a good way to keep the answer objective and clear.
3. Listing with parallel structure: The use of lists like "classrooms, sports fields, and libraries" and "patient wards, operating theatres, and waiting areas" shows good control of parallel structure, making the answer organized and easy to follow.
4. Infinitive of purpose: Phrases like "to support learning and play" and "to help people get medical care efficiently" use the infinitive form to clearly express purpose, which is a strong way to explain reasons in IELTS answers.