The correct answer is: a) Rural areas.
Biogas plants utilize agricultural and household waste to produce biogas, which can be used to generate electricity, heat, and cooking gas. Biogas plants are particularly well-suited for rural areas because they can help to reduce the amount of waste that is sent to landfills, and they can provide a source of renewable energy for rural communities.
Option b, industrial hubs, is incorrect because biogas plants are not typically located in industrial areas. Biogas plants require a lot of land, and they can be noisy and smelly. Industrial areas are typically located in urban areas, where land is scarce and there are strict regulations on noise and pollution.
Option c, urban centers, is incorrect for the same reasons as option b. Urban centers are typically located in areas with limited land and strict regulations on noise and pollution. Biogas plants would not be a good fit for these areas.
Option d, tourist destinations, is incorrect because biogas plants can be noisy and smelly. Tourist destinations typically have strict regulations on noise and pollution, and biogas plants would not be a good fit for these areas.
In conclusion, biogas plants utilizing agricultural and household waste are suitable for rural areas. Biogas plants can help to reduce the amount of waste that is sent to landfills, and they can provide a source of renewable energy for rural communities.