One modern-day social structure that had its origin in the Neolithic era is .

Trade of goods and services" since trade began with the domestication of plants and animals during this time.

answer: the correct answer is d. a christian revivalist movement in the u.s. during the early 19th century

explanation: the second great awakening was lead by the preachers of baptist and methodist congregations in order to gain support for the protestant religion from the 1790's to 1840's