Answer:
Oxygen
Explanation:
Because it’s oxygen I don’t know ♀️
Option B that is CANDIDA is an example of sac fungus.
I would say D it seem to be the likely choice but not a 100%
The second option: meiosis and fertilization
process A is meiosis, you can see that the gamete(haploid cell) results from the diploid cell. The gamete has n chromosomes(39), whereas the diploid cell has 2n(78)
process B is fertilization the two gametes(haploid) fuse together to form the zygote(diploid)