Condensation because the water vapor has a high entropy(disorder) and liquid water has a lower entropy.
Now, i might be wrong but, you have to make a hypotosis of possible theories as to what the truck is doing. Then observe what changes were made after the salt was added then the question should be why was the salt added and how it changed the area. I hope this helps!
The last one is the answer I think
Answer:
The formula NH4OH is ammonium hydroxide. ... The pH of NH4OH is 11.6, so it is a base.
Explanation: