Answer:
"The increase in the cost of resources” is the correct answer.
Step-by-step explanation:
The negative impact refers to the situation when the supply of mechanical pencils decreases while if the supply of mechanical pencil increases then it is termed as a positive impact. However, if the cost of raw materials ( say resources) will increase then it will be costly to produce mechanical pencils. Consequently, the producer will decrease their production and therefore the supply will fall.