The mechanism of regulation, generally between organisms and their environment, of solute and the gain and loss of water is termed as:

Explanation

Option B is correct.•Osmoregulation is a process that regulates the osmotic pressure of fluids and electrolyte balance in organisms. In animals, this process is brought about by osmoreceptors, which can detect changes in osmotic pressure.•Homeostasis is the ability to maintain internal stability in an organism in response to environmental changes. Example: The internal temperature of the human body is the best example of homeostasis. •Thermoregulation is a process that allows your body to maintain its core internal temperature. •Excretion is the process by which organisms expel metabolic waste products and other toxic substances from their body.