1. Comparative structures: The answer uses comparatives like "more adaptable," "much faster," and "fewer responsibilities" to clearly compare children and adults, which is a strong grammatical feature for IELTS.
2. Present simple tense: Most of the answer is in the present simple tense (e.g., "Their brains are more adaptable," "They seem to absorb information"), which is appropriate for stating general truths.
3. Infinitive of purpose: The phrase "to pick up new skills" and "to practicing" (should be "to practice") show the use of infinitives to express purpose or result.
4. Reduced relative clause: "especially when it comes to things like languages or physical activities" is a reduced clause that adds detail without making the sentence too long or complicated.
5. Complex sentences: The answer uses conjunctions like "so" and "which" to connect ideas and add reasons or results, making the response more fluent and natural.