Which abiotic factor has the least effect on the ability of aerobic organisms to live and reproduce in a cave?

The abiotic factor with the least effect is SHAPE OF ROCK IN THE CAVE. The shape of rock in the cave does not impart any influence whatsoever under the survival of the organisms that are living inside the cave. Abiotic factors that have effects in this case include: amount of energy in the cave, amount of oxygen in the cave and the availability of moisture. These are the things the organisms need to survive.

Are you Australian? In that case it would rather ironically be the Aboriginals and their children. If not, (and I'm not 100 percent sure about this one) but this was during the time period of the African American rights Reform period in the United States.