Which activity would be most appropriate to recommend a person who is experiencing a lot of stress?

The main thing to try and do is relieve your mind of the stress, in whatever way you find most suitable. If you are under a lot of stress from your social life, just take a break and do what you like. If you are under a lot of stress from education/studies, again take a break, however making sure you don't fall behind, as this will stress you out more.

For some people, taking a break might be watching YouTube, others having a leisurely walk.

What ar the options

I'm sorry but i don't think i can answer this because me and you probably don't have the same healthy fitness zone standards score i wish i could so sorry