In which of the following process, metal surface is attacked by moisture, acids?

Corrosion

The correct answer is option 1. Corrosion.

In the process where metal surfaces are attacked by moisture and acids, it is known as corrosion. Corrosion is a natural process that occurs when metals react with their environment, especially with moisture, oxygen, and other chemicals present in the surroundings. This reaction leads to the degradation of the metal, often resulting in the formation of oxides, hydroxides, or other compounds on the surface of the metal. Corrosion can weaken the structural integrity of metals, leading to structural failures and other detrimental effects. So, the correct answer is Corrosion.