Peter and Rosemary Grant identified a new species of finch on the Galapagos Islands. This new species formed after a drought occurred on the island. How does this discovery shape our understanding in biology?

a
It shows that when environmental conditions change, populations change through use and disuse.
b
It shows that when environmental conditions change, populations change through natural selection.
c
It shows that when environmental conditions change, populations stay the same through natural selection.
d
It shows that when environmental conditions change, populations stay the same through use and disuse.

b. It shows that when environmental conditions change, populations change through natural selection.

The discovery of a new species of finch on the Galapagos Islands shaped our understanding in biology by highlighting the role of natural selection in driving the evolution of species in response to changing environmental conditions. This discovery supports the theory of evolution and illustrates how species can adapt and diverge over time in order to survive and thrive in their specific habitats.