The priestess, Pythia, foretold the how the Greeks' "wooden walls" would keep them safe. It is believed that the "wooden walls" referred to the fortress walls the navy the homes of the Greek people the forests of the Peloponnesian peninsula

the fortress walls,

Explanation:

Before the battle, the advice of a Greek priestess was sought. Her name was Pythia, and her advice was rarely questioned. She stated that the Greeks would be safe within their "wooden walls." There was much discussion as to what Pythia meant by this. Some thought it meant the Athenians should stay behind the walls of their city.

i think the answer is the one about environmental and social health.

hope this