How does stake make money?

I'm curious about how staking actually generates income. Could you please explain, in layman's terms, the mechanics behind it? I've heard staking involves locking up coins or tokens for a certain period to earn rewards, but I'm not quite sure how the process works. Would you mind breaking it down for me? Is there a risk involved? And how does the reward system operate? I'm really interested in understanding this concept better. Thanks for your help!