Answer:

To protect a house from the influence of weather, it is important to apply a suitable coating. The correct answer is option 'C', which suggests using a spray of kerosene.

Reasoning:

1. Paint:
While paint is commonly used to protect surfaces, it may not be the best option for protecting a house from the influence of weather. Paint is primarily used for decorative purposes and can provide some level of protection against moisture and UV rays. However, it may not be sufficient to withstand extreme weather conditions like heavy rain or strong winds. Additionally, paint can peel off over time, requiring regular maintenance and repainting.

2. Dung cake:
Dung cake is not a suitable option for protecting a house from the influence of weather. Dung cake is primarily used as a source of fuel in rural areas and for agricultural purposes. It does not possess any significant protective properties against weather elements and may even attract pests and insects.

3. Spray of kerosene:
A spray of kerosene can provide some level of protection to a house against the influence of weather. Kerosene is a flammable liquid that can create a thin, water-repellent layer on surfaces. This layer can help prevent moisture from seeping into the walls and causing damage. Kerosene also has some insect-repellent properties, which can be beneficial in protecting the house against pests. However, it is important to use kerosene in a controlled and safe manner, as it is a highly flammable substance.

4. Mud and straw:
While mud and straw can provide some level of insulation and protection against weather elements, they may not be the most effective option for protecting a house. Mud and straw can be vulnerable to erosion and deterioration over time, especially in heavy rain or extreme weather conditions. Additionally, they may attract pests and insects, leading to potential structural damage.

Overall, while all the options have their own merits and limitations, a spray of kerosene can offer some level of protection to a house against the influence of weather. However, it is important to consider other factors such as the location, climate, and construction materials of the house before deciding on the most suitable protective coating.