On the Gal&aacute;pagos Islands, the beaks of finches expand and shrink as droughts and rains change the supply of seeds the birds eat.
(pagos Islands; expand; ) (pagos Islands; shrink; T:as droughts and rains change the supply of seeds) (droughts and rains; change; the supply of seeds the birds eat) (the supply of seeds; eat; the birds)
pagos Islands pagos Islands droughts and rains the supply of seeds
expand shrink change eat
T:as droughts and rains change the supply of seeds
the supply of seeds the birds eat
the birds