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.
C. There is a lack of nutrients
Eukarya. Eukaryotes are the only organisms that have true nuclei and membrane-bound organelles, though some bacteria have a pseudo-nuclei.
The reason why only eukaryotes have true nuclei and membrane-bound organelles is because only eukaryotes have figured out how to create so much energy through the mitochondria, which is required for high compartmentalization.