1. Present simple tense: Used throughout the answer (e.g., "technology opens up opportunities," "People can easily pick up new skills") to state general truths and facts, which is appropriate for this type of question.
2. Infinitive of purpose: "just by watching online tutorials" and "to stay active" show how technology helps people achieve certain goals, making the answer more specific and clear.
3. Coordinating conjunctions: Words like "and" and "plus" are used to connect ideas smoothly, making the answer sound natural and conversational.
4. Relative clause: "that weren’t possible before" adds extra information about the new ways to spend free time, showing the ability to use complex sentences.