1. Use of present simple tense: The answer uses the present simple tense effectively ("is", "offer", "has simplified") to describe general truths and ongoing situations, which is appropriate for the context of discussing current trends in air travel.
2. Passive voice: "the process of planning and purchasing tickets has been simplified" - This use of passive voice focuses on the action and its impact on the user, rather than who performs the action, which is a common and effective way to describe processes and changes in formal contexts.