The key features of the Olmec, Zapotec, and Chavin civilizations would be best summarized by the option:
cosmo-magical beliefs, human features worshipped as deities, and artifacts with mountains, water, and avian qualities.
This option reflects the significance of cosmo-magical beliefs in these cultures, their veneration of deities that often have human features, and their artistic representations which include themes associated with nature such as mountains and water, as well as avian motifs.