Water evaporates into the atmosphere accumulating in the clouds. Than it is released onto the surface helping grow other bodies of water.

Metabolism applies to living organism

When a virus gets in a cell the virus reproduces in the cell.

i got the information at : Britannica kids.com

When a virus reproduces the virus makes copies of itself

Buildings have complicated systems to keep the structures in place

Applies only to living organisms

Solar Panels are made of cells that are designed to catch the sunlight and turn it into energy