Answer:
b. greater; normal
Explanation:
Income elasticity describes the response of the demand of a certain good to the change of the income of the consumers. If the elasticity of income is greater than zero (or is positive) , then we can categorize that particular good as a "normal good". This means that as the income of the consumers increases, the demand of that particular good increases as well.
The counter part of a normal good is called inferior good. They have a negative elasticity of income, which means as the income of consumers increases, the demand of that particular good decreases.
