Question

the process by which living things keep their internal environment stable and balanced, even when the outside environment changes; positive feedback loop; selective permeable; solute; homeostais

Explanation:

The question is about a biological concept. The process described (maintaining internal environment stability despite external changes) is homeostasis (note: there's a typo in the option as "homeostais", but it's the closest). "Positive feedback loop" is a mechanism, not the overall process. "Selective permeable" relates to cell membranes. "Solute" is a substance in a solution. So the correct option is the one with homeostasis (despite the typo).

Answer:

D. homeostais (note: correct term is homeostasis, but this is the option matching the concept)