The choice of the Engagement activity to use depends largely on the topic/content of the lesson and how you want to connect it to real life contexts at the very beginning of the lesson.
For example, in a lesson on Population Growth, I start by asking students the population of the town they live in, then the country they live in, and ultimately ask if they know how many people are in the world. Finally, I show a video clip of world population growth and invite students to raise questions that come to their minds after viewing the video. Discussion of their questions distills down to the following major “lingering” question: “What factors influence human population growth?”