In an ecosystem, some giraffes had long necks and others
had short ones. When something caused low-lying shrubs to die
out, the giraffes with short necks did not get enough food. After
a few generations, the majority of giraffes in the ecosystem had
long necks.
What process is demonstrated by the data?
A. speciation
B. genetic drift
C. natural selection
D. artificial selection
Reason: definition; Natural selection is a mechanism of evolution. Organisms adapt to their environment to survive and pass on the genes that helped them survive. This process causes species to change and diverge over time. This is why the original giraffe had a short neck but it’s neck got longer to survive.
