For all those, usually universities will simply ask for minimum 1-2 sciences between biology, chemistry, maths, psychology, physics, maths, geography (+others i may have missed)
I'll list the helpful ones should take based on the course, but unis will mostly accept any of the above ones I mentioned. However, the 'better' unis sometimes separate needing 2 'hard sciences' from Biology, Chemistry, Physics and Maths. So if you're taking Biology and Maths you should be fine.
1. Environmental science - geography, biology, maths
2. Biological anthropology - biology
3. Psychology - psychology, biology, maths (there's surprisingly a lot of maths in Psychology)
4. Wildlife conservationist - biology, geography
5. ecology - biology, geography
6. Zoology - biology
7. Wildlife Biology - biology
I agree with everyone else that biology and maths are good prospects and feel free to take any other 3rd (or 4th a level) it shouldn't hurt your application.
Also don't be worried about chemistry I took it in year 12 and dropped it cause it was too hard. But I've been accepted into 3 unis to do Zoology with Biology, Psychology and Spanish as my A levels