What process do people go through to solidify their understanding of something they have read?

To solidify is to make something solid or to fully understand, like water becoming ice, or a plan becoming more concrete. If you're meeting a friend, you should solidify the plan before you go and decide where and what time to meet.

Explanation:

make stronger; reinforce.

"social and political pressures helped to solidify national identities"

uh,

i think the answer is second