Reactions within provide most of the energy needed by a typical cell. a- cytoplasmb- the endoplasmic reticulumc- the mitochondriad- the plasma membrane- nucleus

mitochondrion

Explanation: They are membrane bound cell organelles that generates most of the chemical energy needed to power the cell’s biochemical reaction .

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.