Respuesta :

Deforestation has had the least effect on aquatic life.

Answer:

Deforestation.

Explanation:

Deforestation is a large-scale environmental catastrophe that does not have a great effect on the ocean's ecosystem because it does not affect it directly. Deforestation can affect the ocean's ecosystem in the long term due to the reduction of O₂ in the atmosphere, which contributes to global warming affecting the ocean's ecosystem along with pollution.