Answer:
An inferior good
Step-by-step explanation:
First of all, It is important to understand the behavior of the demand curve, if the demand for a good X causes the demand curve to shift from D1 to D2, this means there is an increase in demand.
If a good increases in demand when there is decrease in income, the good is an inferior good because this is a good that is demanded when buyers have to spend cautiously, this means inferior goods are the opposite of normal goods and buyers would normally not demand such items. Such goods could be inferior either in terms of quality, method of production, manufacturers, e.t.c.