Deed
The leader of your branch became the leader from doing deeds. You can't rise to the rank of branch leader if you don't perform a certain number of deeds! Most of them good, I hope.
Picture the leader of your branch doing deeds around your office. Pulling out chairs for people sitting down, emptying the trash, balancing spreadsheets. All good deeds.
き, ぎ
わざ
None
The deed he's currently working on is finding your lost key (き). He doesn't have to help, you're the one who lost your own house-combination-car key. But he's so used to doing deeds, he can't help but help.
Picture him doing this deed. He's crawling around on the floor looking for your key. You aren't really helping, you're just watching him do the deed of key-searching for you.