Readers are used to finding theses there, so they automatically pay more attention when they read the last sentence of your introduction. Writing about something you have good knowledge in, are passionate about always turns into a masterpiece.
The argument s you make in your paper should reflect this main idea.
This sentence lacks tension and doesn't advance an argument. The opposite of a focused, narrow, crisp thesis is a broad, sprawling, superficial thesis.
The list should include a short title for each figure but not the whole caption. Limitations, assumptions, and range of validity. After you have discussed the data, you can write the conclusions section. If some hypothesis can be ruled out as a result of your work, say so. Writing introductions can be intimidating.