This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
.... The higher organisms, such as animals and man, cannot: their needs are more complex and the range of their actions is wider. The physical functions of their bodies can perform automatically on
ly the task of using fuel, but cannot obtain that fuel. To obtain it, the higher organisms need the faculty of consciousness. A plant can obtain its food from the soil in which it grows. An anim
al has to hunt for it. Man has to produce it.
read full book
A plant has no choice of action; the goals it pursues are automatic and innate, determined by its nature. Nourishment, water, sunlight...