It made sense that the organism would need a rich and steady fuel supply.

The other thing the organism needs to grow is nutrition.

Some organisms just need a little bit of mineral content.

To obtain it, the higher organisms need the faculty of consciousness.

All living organisms need food - everyone knows that.

No known organism needs more than one mother and one father.

Because of this, organisms need adaptations that allow them to survive.

An organism needs to invest energy in being beautiful.

By themselves, they cannot do everything that the organism needs to live.

The exercise of these activities is something that the organism needs for its subsistence.