green plants provide food for themselves / animals / consumers by performing photosynthesis & a plant requires sunlight for photosynthesis ->  plants require sunlight to provide food for themselves  plants require sunlight to provide food for themselves & a plant / living thing requires food for survival ->  plants requires sunlight for survival  sunlight is a kind of solar energy & solar energy is a kind of energy ->  sunlight is a kind of energy  plants requires sunlight for survival & sunlight is a kind of energy ->  plants require energy from sunlight for survival  if a living thing requires something then that living thing must obtain that something & to obtain something means to get somehting ->  if a living thing requires something then that living thing must get that something  if a living thing requires something then that living thing must get that something & a plant is a kind of living thing ->  if a plant requires something then that plant must get that something  plants require energy from sunlight for survival & if a plant requires something then that plant must get that something ->  a plant must get energy from sunlight for survival  a plant must get energy from sunlight for survival & grass is a kind of green plant -> grass must get energy from sunlight for survival