In context of this game excerpt from civil disobedience by herbert thoreau what does the word posterity mean

Which of following most accurately describes china today?

What major land feature is located at 0* and 20* e? a sahara desert b kalahara desert c congo basin d the alps

Synthesizing new ideas from a speaker with what one already knows about the subject to see if the information makes sense is an example of a.questioning and challenging b.identifying differences c. forming a statement d.seeing the boader context