Answer:
The third sink is for soaking dishes in a chemical sanitizing solution or hot water for the purposes of sanitization
Step-by-step explanation:
Review the first two sinks:
1. scrubbing the surfaces of the dish to get all the dirty grime off
2. rinse the dishes in cold, clean water
And now onto our answer:
3. The third sink is for soaking dishes in a chemical sanitizing solution or hot water for the purposes of sanitization (You had already gotten it clean, now just sanitization.)