Volume
It could be the capacity of a coffee cup.
tea in a cup
The most reasonable unit of capacity to measure a can of applesauce would be either fluid ounces or milliliters. These units are commonly used for measuring liquids and can provide a precise measurement of the volume of the can.
Liters (Most European and Asian countries quote capacity of refrigerator in liters)
Any volume units are feasible, but it would usually be measured (in metric at least) in millilitres. It may be measured (or even defined) as 5 ml, or 1/6 of a US fluid ounce, depending on where in the world you are.
answer the question please
The most appropriate unit to measure the capacity of water in a bathtub is liters (L) because it provides a more practical and easier-to-understand measurement compared to milliliters (mL) for larger volumes of liquid like water in a bathtub.
Gallon
You would most likely use milliters.
It depends on the size of your tablespoon, but most likely it does not. The volume measure of 1 standard tablespoon is 4.9282159 milliliters or 4.9282159 cubic centimeters.
The most appropriate metric unit measurement for the capacity of a paper cup is milliliters (mL) or cubic centimeters (cm³). These units are commonly used to measure the volume of liquids and solids in small containers like paper cups.
you would use gallons to measure the capacity of a bathtub