The DNA has to replicate before mitosis to keep the number of chromosomes consistent. Hope this helps.
You didn't attached the choice but then I have two answer either of the two is correct. The first one is Putamen , is located on the base of the telencephalon (forebrain). Second answer is Angular gyrus is a region part of the brain and it is involved in number of processing related to number processing and spatial cognition, language, attention and memory retrieval.
in my knowledge biotic factors could affect this process of photosynthesis