which occurs when a warm fluid cools down?\nenergy is released to the environment.\nenergy is absorbed from…

which occurs when a warm fluid cools down?\nenergy is released to the environment.\nenergy is absorbed from the environment.\nthe density of the fluid decreases.\nthe mass of the fluid decreases.
Answer
Brief Explanations:
When a warm fluid cools down, it loses thermal energy. This energy is transferred to the surrounding environment. According to the principle of conservation of mass, the mass of the fluid remains constant during cooling. Also, as the fluid cools, its volume usually decreases (for most substances), and density $\rho=\frac{m}{V}$ increases (since mass $m$ is constant and volume $V$ decreases). So, energy is released to the environment.
Answer:
Energy is released to the environment.