Darwin proposed the mechanism of natural selection to explain the observable patterns of evolution. He based his argument for natural selection on two observations and two inferences:

Observation #1: Members of a population often vary in their inherited traits.
Observation #2: All species can produce more offspring than their environment can support, and many of those offspring fail to survive and reproduce.
Inference #1: Individuals whose inherited traits give them a higher probability of surviving and reproducing in a given environment tend to leave more offspring than other individuals do.
Inference #2: The unequal ability of individuals to survive and reproduce will lead to the accumulation of favorable traits in the population over generations.
Sort the three statements related to the Take the Heat article based on which of Darwin's observations or inferences it corresponds to:

O Some corals can survive heat exposure that other corals of the same species cannot
O Corals native to highly variable pools were resistant to bleaching than corals transplanted to highly variable pools from moderately variable pools
O Corals native to the highly variable pools have different alleles and express some genes at a different level than corals from moderately variable pools.

1. Variation in a population
2. Overproduction of offspring
3. Differential survival and reproduction
4. Adaptation