An unripe fruit will ripen faster if placed next to a ripe fruit because of

A gas called Ethylene which is given off by the already ripened fruit speeds the process of ripening for the unripened fruit.

a and c are the answeres

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.