Which tools did early communities first use to help them grow enough food to feed their residents and have a surplus at times?

A)tractors, combines, and GPS locators
B)polished stone tools, pottery, and canoes
C)wooden plows, pesticides, and flails
D)sickles, moldboard plows, and threshers

B) polished stone tools, pottery, and canoes

Explanation: Got the answer right

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.