How it was explained to me by Rito Support a long time ago, so long as you report a player for anything, their system will automatically check every box and additionally other offenses that don't necessarily fit any of the listed categories. If you report a player for feeding, it will check their chat log too & vice versa.
For unlisted offenses, hypothetically imagine a player trolling by stacking Tears on a mana-less champion; an Anivia walling allies in to their deaths; or somebody picking Sona. None of these are necessarily "intentionally Feeding" per-say, but they are all forms of Gameplay Sabotage and intentionally attempting to lose or throw the game in another manner that doesn't include Repeatedly Dying, which are all punishable. Players will tend to report this as either "Negative Attitude" (which is admittedly a catch-all for all offenses) or "Intentional Feeding" because there isn't a "Sabotage" option.
Whether Rito actually acts on reports is another matter entirely.