Life is made of different or forms of life.

The definition and the structure of life are said to be very complicated. Thus, life is defined as an organism maintaining homeostasis. It is made up of cells that undergo metabolism that can grow, adapt and respond to stimuli. Life is said to start as a single cell that had multiplied over time, forming a different kind of species and forming an eco-system that is interdependent for their survival.

The answer your looking for is a food chain grid. it describes how nature can support itself and survival of the fittest comes into play..

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem