Why can the moth and the $Yucca$ plant not complete their life cycles without each other?

• A
  They share a mutualistic relationship where the moth provides pollination and the plant provides a site for egg-laying.
• B
  The moth is the only predator of the $Yucca$ plant.
• C
  The $Yucca$ plant provides nutrients directly to the adult moth.
• D
  The moth feeds on the leaves of the $Yucca$ plant.