Which of the following goods is both nonrival and nonexcludable?
a tuna in the ocean
a hot dog at a hot dog stand
the light from a lighthouse at a harbor entrance
a soccer match in a stadium

The light from a lighthouse at a harbor entrance

Explanation:

Non-rival and non-excludable commodities lie under Pure Public Goods which means that consumption of these goods by an individual doesn't change the supply or demand for other individuals i.e. non-rival and the individual is not excluded from the consumption of this good. Hence, the light from a lighthouse  is non-rivalrous and non-excludable.