# data[].attributes.body
The drought completely wiped out the birds main food source.It also decreased the amount of food for the other types of plants.So even the big beak birds had to worry about food.

In 1977 the drought started and that made the small birds die.

# data[].attributes.body
Natural selection is the reason that the beak size changed in a two-year span

the reason why most finches died was because of the drought almost all the plants died because of the lack of water and the plants that the finches eat died, the finches with the small beaks couldn't live because of the lack of water growing the plants. the finches with the bigger beaks survived because they could break open the hard seeds unlike the finches with the small beaks

# data[].attributes.body
The drought started in 1977 the medium ground finch population went down from 751 - 91.  The plant population also went down because of the lack of water.

This shows why natural selection caused the beak of the ground finch to grow in size because of the drought, the only birds that could survive were the birds with the long beaks.

# data[].attributes.body
Natural Selection caused the beak of medium ground finch population to increase in size from 1976 - 1978