Barack Obama was elected president in November of 2008. He was sworn in January 20, 2009.
The answer is ‘behavioral isolation’. It is a form of
sympatric speciation - which occurs even when
species live in the same habitat. In this case,
the individuals in the population are isolated by differences in mating and probably different mating rituals.
I believe the order is...
Producers
Primary Consumers
Secondary Consumers
Tertiary Consumers
I hope this helps!