The absense of humans on the island to disturb the biodiversity
Phosphate groups are polar and allow the cell to exist in water.
Hydrogen and Oxygen. Better known as H2O
Yes Mothballs are an active ingredient and the active ingredient could either be paradichlorobenzene or naphthalene .Each of those active ingredients can react to different health problems if its exposed high enough .SOO slowly mothballs turn from solid to Toxic vapor .