Final answer:
After the drought on Daphne Major, the average beak depth of the next generation of finches is likely to have increased.
Step-by-step explanation:
The average beak depth of the next generation of finches on Daphne Major is likely to have increased after the drought subsided. This is because during the drought, there were fewer seeds available for the finches to eat, and birds with bigger beaks had an advantage in cracking and eating seeds of all sizes. As a result, many small-beaked finches died, while those with bigger beaks survived and reproduced. This led to the evolution of larger beak sizes in the finch population.