Final answer:
Among the given options, societies conducting important corn-planting ceremonies was NOT an example of the importance of war and raiding among Plains Indians, as corn-planting was an agricultural practice not directly related to warfare.
Step-by-step explanation:
The option that was NOT an example of the importance of war and raiding among the Plains Indians is b) Societies conducted important corn-planting ceremonies. This activity was generally unrelated to war and raiding, which were pervasive aspects of Plains Indian culture and society. War and raiding held great significance among Plains Indians for several reasons, including prestige, obtaining goods, and vengeance. Children were indeed named after warriors' exploits, women displayed their family members' war and raiding trophies, and traditional religion included symbolism of raiding and war, all of which underscored the importance of these activities. Corn-planting ceremonies, however, were agricultural practices largely tied to the roles of women and reflected the complementary gender roles within tribes.