Historic westminster abbey in london, england, has been damaged by the sulfur dioxide and nitrogen oxide in acid rain. this is an example of chemical weathering biological weathering physical weathering

Chemical weathering
Weathering is usually a mechanical process, but in this case, weathering is occurring due to chemical reaction with substances dissolved in the rainwater. This is chemical weathering.

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)

Chewy,wrapped,not in all white,the wrapper is clear