# data[].attributes.body
Natural selection ocurs when the trait affects survival and/or the ability to reproduce. The birds eat the tribulus seeds and the portulaca seeds. When seeds aren't there the birds will eventually die. Overtime the beaks have adapted to the way they eat the seeds so when the beak isn't adapting (as in the beak not being long enough) they can't eat the seeds which causes them to die. The drought caused the seeds to die which made the food not available to the birds, which caused the birds to starve and die

# data[].attributes.body
3 years before the drought there was an average of 393 millimeters of rainfall. during the drought there was a average of millimeters of rainfall, 3 years 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 was 10.55 mm. The average beak length was 11.61 mm
drought

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

# data[].attributes.body
natural selection caused the beak of meduim ground finch population in daphne major to increase in size from 1976 to 1978
finch

# data[].attributes.body
which mechanism of mircoevolution caused the beak of medium ground finch population of daphne major to increase in size from 1976 to 1978