Final answer:
Steam sterilization, or moist-heat sterilization, is effective only at high temperatures.
Step-by-step explanation:
Steam sterilization, also known as moist-heat sterilization, is a highly effective method used for controlling microbial growth. Unlike dry-heat sterilization, which uses high heat, steam sterilization uses moist heat to penetrate cells better. Autoclaves are commonly used for steam sterilization, where temperatures are raised above the boiling point of water to kill microorganisms, including endospores. Therefore, option c) 'It is a form of low-temperature sterilization' is incorrect. The correct statement is option a) 'It is effective only at high temperatures'.