Question

river valley civilizations quick check
which of the following best shows how river valley civilizations built upon existing neolithic technology? (1 point)
river valley civilizations made discoveries with tools and metallurgy that previous civilizations were unable to produce
river valley civilizations built upon the early wheel, plow, and bronze weaponry that were used to a limited extent in the neolithic period
river valley civilizations added new tools in addition to stone tools from the neolithic period and expanded on preexisting knowledge of metallurgy.
river valley civilizations continued to use neolithic technology and made a few improvements largely unrelated to agriculture

Explanation:

The Neolithic period saw the development of early technologies like the wheel, plow, and some bronze - related items in a limited way. River valley civilizations built on these by further developing and using them more extensively. The first option is too broad about discoveries. The third option is not as comprehensive as the second. The fourth option is incorrect as improvements were related to agriculture and more.

Answer:

River valley civilizations built upon the early wheel, plow, and bronze weaponry that were used to a limited extent in the Neolithic period.