In geometry, components used in deductive reasoning include all of the following except: A.) Postulates
B.) Theorems
C.) Observations
D.) Definitions

Answer is B. Tsunamis. Think of it like this, what changes and has a pattern to it. Seasons change from fall, winter, spring, and summer. Day changes to night. Food webs change when a new species is introduced into the environment or a species decides to relocate to find better food. Tsunamis are just natural disasters that don't change. A tsunami is just a tsunami. They cause the same damage each time.