Which of these is the hardest and easiest a level... Watch
Physics is quite rare, not a lot of ppl pick it so that would be good but i would DEFINITELY choose it with maths as they really complement each other. Chemistry is a really useful a level for keeping options open and so is biology if u want to go into health care. biology is not hard, its just a lot to memorise- chemistry is more challenging and maths, you either can or you can;t do it (so you'll either get a high A or a D). No opinion on geography i did it for GCSE (got top 5 in the country) but found it was a lot of common sense- depends what course you want to do.
I'd pick a language
i wouldnt pick english or history with science a levels as they're pretty demanding
would be a nice combination