A. You have quite a few options when your term life policy expires:
1) If your health condition got worse
In this case, it will be a good idea to convert your term life to a permanent life policy so you can take advantage of the same underwriting class you are getting for your term life policy, because otherwise you either can't get a life insurance due to your poor health or a very expensive one due to a lot worse underwriting class.
2) Keep the term life policy
You can keep the term life policy, but your premium will go up significantly. Or if you keep paying the same premium amount, but your coverage amount will be a lot lower.
3) Terminate the policy
If you stop paying your term life's premium, your policy will lapse.