What background knowledge would best add to a reader's understanding of an online article about recycling in local communities?

Incomplete question. The options:

reflecting on information gained while visiting a local recycling center

Explanation:

It is important to note that the correct answer cannot be the first option, because simply having previous computer skills does not in a way help you understand subjects related to recycling.

Also, merely knowing the day of the week recycled goods are picked is not educative as to the subject of recycling, as well as remembering facts from a previously read article about organic gardening.

But the important factor that would best add to a reader's understanding of an online article is: reflecting on information gained while visiting a local recycling center. This would give you a preview of how the recycling work is organized.

1, 4, and 5 are all conflicts