What do I say about why I left my last job? - any advice?

They always ask why I left, and I freeze. I have been practising in the mirror. Do they ask follow-ups?

Thanks for writing this out. I went through something close to it 10 months ago, and it got easier once I kept a simple log of every call and form.

I keep it to two sentences: the company cut my team, and here is what I am proud of and what I am looking for next.