Is the following sentence true or false all waves obey the law of reflection

TRUE, because The Law of Reflection states that the angle of incidence equals the angle of reflection. Waves do not always bend when entering a new medium. No bending occurs if a wave enters a new medium at a right angle.

answer///adding drawings and tables to your document;

interact. i am not 100% sure with this, but you can communicate without speaking, so i think interacting is more precise answer.