Christianity (60.5%)
Traditional African religion (32.9%)
Islam (6.2%)
Other (0.4%)
That said, although I know this sounds incredibly harsh, and some will call it racist, the food aid needs to be tied to some sort of truly effective birth control program. After 2 kids (maybe 3 in high mortality regions), no birth control, no food. Otherwise the problem goes on, getting worse, forever.
As Heinlein said (paraphrasing Malthus?), "The worst thing you can do to a hungry man is to give him food."