I'm about to go into my first year of sixth form, and I am still undecided on my fourth option. At my school, if you do further maths, you have to do four A-Levels (due to the rate at which it's dropped), so while I've chosen my main four, Physics, Maths and Further Maths, I'm stuck between biology and chemistry as my fourth.
For some context, I hope to, in the future, go into astrophysics and study either physics or natural sciences at uni. I have hopes of going to Cambridge and taking their natural science course (physical) however, while I prefer biology I am not sure if not picking chemistry would put me at a disadvantage.
Along with this, when I was doing my pre-enrolment tasks I realised there was a lot of chemistry in both biology and physics which I fear would make it more difficult to understand certain topics if I didn't take it.
But since I'm doing 4 A-Levels I'm also worried about difficulty and balancing revision. I know Chemistry is meant to be very hard, but maybe I might find it easier due to my maths skills? Whereas biology is supposed to be a bit easier but has a lot to revise, though I enjoy it more than chemistry.
So all of this is to say I really have no clue which to take and I'm worried that four A-Levels will affect my grades so I am unsure which, in this scenario would be best to select. Any advice is very appreciated!