Final answer:
An obligate halophile is an organism that requires high salt concentrations for growth and will burst if placed in fresh water.
Step-by-step explanation:
An obligate halophile is an organism that requires high salt concentrations for growth. These organisms have adapted to survive and thrive in environments with high osmotic pressure. If placed in fresh water, an obligate halophile will experience a lower salt concentration in its surroundings, causing water to flow into the cell and potentially leading to cell bursting.