Question

4 fill in the blanks to complete the sentences. not all answer choices will be used. william smith observed that \boxed{} are unique to specific rock layers. this means that rocks with the same fossils must have formed \boxed{} time, even if they are located thousands of miles apart.

answer choices (yellow boxes): colors, fossils, at a different, folds, around the same

Explanation:

William Smith's work established the principle of faunal succession, which states that fossils are unique to specific rock layers, and rocks containing the same fossils formed around the same time, regardless of distance.

Answer:

1. fossils
2. around the same