Because they lack chlorophyll (the green pigment that absorbs energy from sunlight and uses it to make food), mushrooms get the food energy they need in other ways.
(they; lack; chlorophyll) (the food energy; need; they) (the green pigment; absorbs; energy; from sunlight) (the green pigment; uses; it; to make food) (mushrooms; get; the food energy they need in other ways)
they the food energy the green pigment the green pigment mushrooms
lack need absorbs uses get
chlorophyll
they
energy from sunlight
it to make food
the food energy they need in other ways