1. Which statement correctly describes all four types of weather fronts?

the sphincter muscles at the end of the digestive tract is the anus.

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.

answer///unconditioned stimulus;