The correct answer is: B. it has alternative uses.
Demand for electricity is elastic because it has alternative uses. This means that if the price of electricity goes up, people will be more likely to use other forms of energy, such as solar power or wind power. Additionally, if the price of electricity goes down, people will be more likely to use more electricity.
Option A is incorrect because electricity is not necessarily expensive. The price of electricity varies depending on the time of day, the season, and the location. Additionally, there are a number of government programs that help to make electricity more affordable for low-income households.
Option C is incorrect because electricity does not have a number of close substitutes. There are a few alternative forms of energy, such as solar power and wind power, but they are not as widely available or as affordable as electricity.
Option D is incorrect because demand for electricity is elastic. This means that a small change in price can lead to a large change in demand.