Genotypes=genetic makeup
Phenotypes= physical characteristics
You can not change your genetics, so that means C is out!
Said genotypes are usually inherited as well so A is out.
I’m not 100% sure but i would deduce the answer is B
D.) ATP production takes place in Mitochondria
Carbon dioxide + Water → Glucose + oxygen
If you're talking about ocean currents then I think I can help. They change due to the wind, temperature and density differences.