On a trip to the bay area in San Francisco, Jason saw a sight similar to this image—several shallow ponds with mounds of a white substance in them. Choose the correct word to complete the sentences to explain what this substance is. The sight Jason saw was the non-mechanized process of harvesting _ from the ocean by evaporation of seawater. Although _ is also extracted from seawater, it is done through the process of electrolysis.

Blank 1 choices
Sodium chloride
Sand
Magnesium

blank 2 choices
Sodium chloride
Magnesium
Manganese