Question

4 fill in the blanks to complete the sentences. not all answer choices will be used. william smith observed that blank are unique to specific rock layers. this means that rocks with the same fossils must have formed blank time, even if they are located thousands of miles apart. answer choices (yellow boxes): colors, fossils, at a different, around the same, folds

Explanation:

William Smith's work focused on fossil succession, a key principle in geology. He observed that certain fossils are unique to specific rock layers, and rocks containing these identical fossils formed at the same time regardless of location.

Answer:

1. fossils
2. around the same