The arrows represent the flow of energy from matter such as planets and animals. Since energy flow in an ecosystem is in a cyclic manner the energy is neither created nor destroyed.
As per the image, the hydrosphere, geosphere, and atmosphere along with the biosphere all are interacting with each other and are dependent on the existence of one another.
Hence during the Precambrian peroid the flow of energy and took place lead to the formation of the biospheric ecosystem. That lead to the evolution of life on earth.
Learn more about the arrows in the diagram showing continuously.
