Final answer:
When the price of beef decreases, the demand for beef is expected to decrease and not increase. This is because consumers will substitute beef for the now cheaper alternative, pork.
Step-by-step explanation:
When the price of beef decreases, you can expect the demand for beef to decrease (option 3) rather than increase. This is because consumers will substitute beef for the now cheaper alternative, pork. This is supported by the information that changes in taste shift the demand curve rightward for chicken (increase) and leftward for beef (decrease). The increase in chicken consumption and decrease in beef consumption from 1980 to 2014 is an example of this substitution effect.