Chen is attempting to make his own beer through alcoholic fermentation. After the fermentation stage, Chen finds that one of his batches has no alcohol content. Which of the following could have happened during the fermentation step of this batch? a. There was too much sugar present in the mixture.
b. There was too much pyruvate present in the mixture.
c. The container allowed oxygen to leak in.
d. The container allowed oxygen to leak out

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

cuz some people don't have enough food. that's why we need more ppl to donate food to the hungry.

answer( increase) their individual contractile activity;