Section 465 refers to the at-risk rules while Section 469 refers to the passive activity loss rules and they have particular relevance in the About Your Business section if you are aggregating your activities to avoid either one or both (which, chances are, you are not).
See https://www.irs.gov/pub/irs-wd/201805013.pdf
See also https://www.irs.gov/pub/irs-drop/rp-10-13.pdf
