Thank you for the opportunity to help you with your question!
Intrinsic motivation is caused when one simply likes doing something and extrinsic motivation happens when one is lured in by rewards and benefits of completing the task. Example of intrinsic motivation is; a lady goes to the gym everyday because she loves working out. An example of extrinsic motivation is; a lady goes to the gym everyday because she hopes to gain an awesome body.
Please let me know if you need any clarification. I'm always happy to answer your questions.