Rewrite and complete the following sentences by inserting the correct word in the space indicated :
............ causes corrosion of the marble or brick surface.

Explanation

To complete the sentence, we need to identify the factor that causes corrosion of marble or brick surfaces. Based on the information provided, we can conclude that:

1. **Identify the context**: The question refers to a process that leads to the deterioration of marble or brick surfaces.
2. **Recall relevant examples**: The Taj Mahal, which is made of marble, is mentioned as an example where corrosion is evident.
3. **Determine the cause of corrosion**: The video mentions that acid rain is responsible for the corrosion of the marble, changing its color from white to yellow.
4. **Complete the sentence**: Therefore, we can fill in the blank with "acid rain".

Final answer: **Acid rain causes corrosion of the marble or brick surface.**