Sundews (Drosera species) are carnivorous plants that typically inhabit nutrient-poor, waterlogged peat bogs.
Which of the following is an abiotic factor that directly affects the growth and survival of sundews in a peat bog?
The concentration of gaseous nitrogen (N2N_2N2) in the soil air spaces
The abundance of dipteran prey (such as midges) captured by the leaves
The concentration of hydrogen ions (pHpHpH) in the waterlogged peat
The density of Sphagnum moss species competing for light and space
