b. the first stage because it could never be in the secound stage
I believe the answer you're looking for is cellular respiration.
Lipids are good for making the cell membrane because they are stronger and block out things that should not be getting in out, for instance lipids mainly only let water and gases pass through.
The area of the frontal lobe that is devoted to the production of fluent speech is the Broca's area. It contains neurons that is involved in speech production and language comprehension. It is classified into two parts namely the pars triangularis and the pars opercularis.