When the wick is lit, the kerosene in the wick undergoes a chemical reaction with oxygen in the air to

release energy in the form of light.

Which change to the device would increase the amount of time the lantern provides light?

The case considered is of a kerosene lamp. Kerosene acts as a fuel to generate light. It undergoes combustion where it reacts with oxygen in the air to release light. The wick draws the kerosene and burns it. To increase the amount of time the lantern provides, we can decrease the length of the wick to avoid more consumption of the kerosene. Before lighting the wick, we first need to check the quantity of the kerosene present and also ensure to change the wick at least once a year.