All cultures are alike in that they all seek:
alliances, kin, and support
food, protection, and prosperity
rites of passage
visions, omens, and oracles

The answer would be : food, protection, and prosperity
Food and protection are very essential for all living organism, human included. And as for prosperity, it's the basic human nature as the most intelligent creature on the earth to think in the long term, that's why we seek prosperity

Im pretty sure the answer is d.) is more densely populated.