Question

Ghost plant is a parasitic plant species that has no chlorophyll and cannot perform photosynthesis. These plants have a complex chain of parasitism that ultimately results in ghost plants receiving (“stealing”) sugars produced by another photosynthetic plant species. Importantly, evolutionary biologists have discovered that ghost plants are descended from photosynthetic ancestors that had chlorophyll.
Make sure to include all the components required for a properly constructed and cohesive NATURAL SELECTION explanation.

if you don't know what is natural selection, please don't give me a guess!