What are the three inference (conclusions) darwin made based on his observations?

1. A Struggle for Survival

2. survival will reproduce

3. Superior adaptive variation

Explanation:

1. Observation: overproduction of offspring that can possibly survive.

CONCLUSION: A Struggle for Survival, most of this offspring fight for food and water.

2. Observation: variation in species: member of the same species have different ways of identification, which are color, sex, e.t.c

CONCLUSION: Those individuals that survive and reproduce do so in consequence  of "superior adaptive variation" (they are "more fit")

3. Observation: Variation heritable through selection: most survival pass there favourable adaptation to their offspring.

CONCLUSION:  Superior adaptive  variation will be passed on to offspring generation.

reference: https://www.mun.ca/biology/scarr/4250_History_II.html

the correct answer is:

a population changes in response to a change in the environment.

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