What do I say about why I left my last job?

They always ask why I left, and I freeze. This is my first time dealing with any of this. I also do not want to seem like a risk. What do you say?

If a company has been in the news for layoffs, you can mention that. Often the interviewer already knows.

Thanks for writing this out. I went through something close to it last year, and it got easier once I kept a simple log of every call and form.