Which statement offers the best critique of how humans have impacted the environment through agricultural activities?

1) Humans did not impact the physical environment until the last 150 years.
2) The agricultural practice of slash and burn does not impact the physical environment in modern times.
3) Human agricultural activities have always impacted the physical environment.
4) Chemicals applied on agricultural crops have led to the lessening of cultural eutrophication.

Option 4) Chemicals applied on agricultural crops have led to the lessening of cultural eutrophication does not offer a critique of how humans have impacted the environment through agricultural activities. It implies that the use of chemicals in agriculture has had a positive effect on the environment, rather than acknowledging any negative impacts.

The statement that offers the best critique of how humans have impacted the environment through agricultural activities is option 3) Human agricultural activities have always impacted the physical environment.

This statement acknowledges that human agricultural activities have consistently had an impact on the physical environment, recognizing that it is not a recent phenomenon limited to the last 150 years. It implies that throughout history, humans have influenced and modified the environment through their agricultural practices. This critique highlights the long-standing and cumulative effect of human activities on the environment, emphasizing the need for sustainable agricultural practices to minimize negative impacts.