Which is a component of the biosphere? A.
argon
B.
permafrost
C.
mountains
D.
bacteria

D. Bacteria

Explanation:

The biosphere is the layer of the Earth where all living organisms live and interact with each other. The biosphere is a broad concept that includes all the regions of the Earth where an organism can live or where organic material can exist. Since bacteria is a living microorganism, it is considered a component of the biosphere.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.