An example of quaternary economic activity is a. packing vegetables in a can b. deciding how many cans of vegetables to store at a warehouse c. eating vegetables at dinner d. growing and harvesting vegetables in a field

The correct answer is - B. deciding how many cans of vegetables to store at a warehouse.

The quaternary economic activities do not involve physical involvement into the production, trade, or storage of the products, but instead, this type of economic activity is performed strictly by using ones brain, thus making decisions and plans that are going to be performed by the workers in the primary and secondary (occasionally in the tertiary) economic layers.

river is shown in this type of map

i believe this is