It is true that short-run aggregate supply is emphasised because it is the version of aggregate supply that can explain changes in output and prices.
The above statement is true because the short-run aggregate supply can be used to provide explanation for variations in output and prices.
The other version is the long-run aggregate supply, however, it cannot and will not provide explanation for price and output variations at the same time.
This is the reason short-run aggregate supply is always emphasized.
Learn more about short-run aggregate supply here: https://brainly.com/question/24130128.