Question

what was the primary significance of charles lyell’s conclusion that the earth’s geological features changed slowly over a very long time? it helped mary anning locate fossils more easily. it showed that volcanic eruptions were the main cause of geological change. it provided the vast timeline necessary for the slow process of evolution to occur. it proved that all fossils found in rock layers are from extinct species.

Explanation:

Charles Lyell's work on uniformitarianism emphasized that geological processes are slow and occur over vast time scales. Evolution by natural selection (proposed by Darwin) required a long timeline for gradual changes to accumulate in species. The third option connects Lyell's conclusion (slow, long - term geological change) to providing the necessary time for evolution. The first option is about Mary Anning's fossil - finding, not Lyell. The second option misrepresents Lyell's focus (he focused on gradual processes like erosion, deposition, not volcanic eruptions as the main cause). The fourth option is incorrect as Lyell's work didn't prove all fossils are from extinct species.

Answer:

It provided the vast timeline necessary for the slow process of evolution to occur.