A few plants are parasitic on other organisms, and have given up photosynthesis. An example is the Bird's-Nest Orchid (https://en.wikipedia.org/wiki/Neottia_nid

A few plants are parasitic on other organisms, and have given up photosynthesis. An example is the Bird's-Nest Orchid (https://en.wikipedia.org/wiki/Neottia_nidus-avis https://en.wikipedia.org/wiki/Neottia_nidus-avis) which is parasitic on a woodland fungus. But these examples are unusual; the vast majority of plants get their energy the normal way, through photosynthesis using cholorophyll.