Final answer:
Sulfur-oxidising bacteria are found in deep-sea vent ecosystems and arid desert environments.
Step-by-step explanation:
The organisms that contain sulfur-oxidising bacteria are c) Deep-sea vent ecosystems and d) Arid desert environments. Sulfur-oxidising bacteria are a type of chemoautotrophs that capture energy from inorganic compounds, such as sulfur, to produce organic compounds. They are found in deep-sea vents where they form the base of the ecosystem, providing energy for other organisms, and in arid desert environments where they play a role in sulfur cycling.