Being in a lab is hands on with chemicals but not the real habitat. Working with patients helps you learn about the actual thing and habitat
Read the important events and underline the main idea
It's important not to confuse the theme and the main idea. The theme is an underlying message of bravery, or hope, or love. The main idea, however, is simply what the story is about. In a way, the main idea is a tight summary of the plot.