# data[].attributes.body
Natural selection occurs when the trait affects survival and/or ability to reproduce. The birds eat the portulaca and tribulus seeds. When the seeds aren't there the birds die. Overtime the beaks have adapted (as in the beak not being long enough) they cant eat the seeds which causes them to die. The drought caused the seeds to die which made the food for the birds unavailable which cause the birds to starve and then die.

# data[].attributes.body
3 years before the drought there was an average of 393 millimeters of rainfall. During the drought there was an average of millimeters of rainfall. After the drought there was an average of 630 millimeters of rainfall.

# data[].attributes.body
Before the drought the beak depth was 9.65 mm. The average beak length was 10.71 mm. After the drought the average beak depth was 10.55 mm. The average beak length was 11.61 mm.

# data[].attributes.body
The birds eat the seeds out of portulaca and tribulus plants. Before the drought there was an average of 9.7 portulaca seeds per month before the drought, and an average 3.7 seeds during the drought, and an average .36 seeds after the drought. There was an average of 8.8 tribulus seeds before the drought, an average of 8.3 seeds during the drought, and an average of 4.9 after the drought.

# data[].attributes.body
Natural selection caused the beak of medium ground finch in Daphne major to increase in size from 1976 to 1978.