How did writing make Egypt complex civilization and technology possible?

i think it is Among the many inventions or innovations of the ancient Egyptians was the ox-drawn plow and improvements in irrigation. The ox-drawn plow was designed in two gauges: heavy and light. The heavy plow went first and cut the furrows while the lighter plow came behind turning up the earth.

Explanation:

radiant energy is a form of kinetic energy only.(a)

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.