The graph shows the supply and consumption of forests when the
consumption rate and population growth rate are both low.
Resource Consumption
Millions of hectares
800
1000
0 200 400 600
Years
-- Total supply
Total consumption
What is the significance of the intersection of the red and green curves?

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.