The correct answer is Option 1: Perishable goods.

Here's why:

• Very Short Period (Market Period):
  • In the very short period, also known as the market period, the supply of certain goods is fixed. This means that the quantity supplied cannot be changed, regardless of the price.
  • This is particularly true for perishable goods.
• Perishable Goods:
  • Perishable goods, such as fresh fruits, vegetables, or flowers, cannot be stored for long periods.
  • Once they are produced, they must be sold quickly.
  • Therefore, the supply of these goods is fixed in the very short period, and the supply curve becomes a vertical straight line.