Weather forecasters expect a hot, dry summer in the parts of Africa where bananas grow. Bananas do not grow well in hot and dry weather. What will probably happen to the overall supply of bananas?
The supply will probably go up. The supply will probably go down.
Overall supply is the total amount of a good or service that producers make and sell. There are several things that can make overall supply go up or down. The table below shows how changes to these things might affect overall supply.
 | Resources | Number of producers or suppliers | Expected change in demand
Supply goes up | when resources cost less or are easier to get | when there are more producers or suppliers | when demand is expected to go up
Supply goes down | when resources cost more or are harder to get | when there are fewer producers or suppliers | when demand is expected to go down
Producers are people or companies that make goods or provide services. Suppliers are people or companies that sell goods or services. New inventions or technologies can also help workers produce goods and services more quickly. As a result of these changes, the supply of a good or service will often go up.
Hot and dry weather makes it more difficult to grow bananas. Fewer bananas will survive the growing season, and there will be fewer bananas to sell. So, the supply of bananas will probably go down because the bananas, which are resources, are harder to get.