Question

the biosphere
hydrosphere atmosphere
biosphere geosphere
why would adding arrows to connect the four systems be useful for developing the model?
a. each system exchanges matter or energy with the other systems.
b. each system has temporary parts that may be replaced by another system.
c. matter and energy flow in one direction through all four systems.
d. living things may move among the four systems.

Explanation:

The hydrosphere, atmosphere, biosphere, and geosphere are interconnected through the exchange of matter and energy. Arrows in a model would represent these exchanges. For example, plants in the biosphere take in carbon - dioxide from the atmosphere and water from the hydrosphere for photosynthesis.

Answer:

A. Each system exchanges matter or energy with the other systems.