How are the lines from The Dunciad that appear in the lesson a parody of Milton's account of Creation?

The correct answer is : It is an intention to mock the poem.

Explanation:

It can be said that those lines are directly derived from the biblical book of Genesis.  The Milton's work discusses the creation of plants and animals from the void Earth and is parodied here where idiotic poems and plays from the chaos are created. It is a clearly a parody, intended to mock the poem.

early settlements on the subcontinent. both the indus and the ganges rivers carried rich silt from the mountains to the plains. when the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.

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.