# data[].attributes.body
the graph is showing that the numbers are inconsistent

# data[].attributes.body
helping survival and slowly getting traits passed down.

# data[].attributes.body
if their beak isn't big and strong the bird will die of starvation.

# data[].attributes.body
they got adapted to their environment to get the hard seeds.

# data[].attributes.body
beaks needed to be stronger in order to eat the bigger harder seeds.

# data[].attributes.body
natural selection helped their beaks develop to eat the hard seeds.

# data[].attributes.body
the graphs for population were never on a steady increase or decrease.

# data[].attributes.body
1. this doesn't support migration because if there were a steady increase or decrease then it would be a migration.

# data[].attributes.body
natural selection