Cache memory levels are based on proximity to

Microprocessor Chip

Explanation:

The levels depend on the proximity to it.

L1 means that's built on the microprocessor chip.

L2 means that's built separately, like an expansion card for example.

not too sure but maybe in the hot springs.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.