Anode is a point on a wave where there is no vibration.

a. true

b. false

  A. True

Explanation:

  A node is a point along with a standing wave where there is a minimum amplitude. The opposite of it is an anti-node, a point where the amplitude is at maximum.

  In a standing wave, the nodes are located at equally spaced intervals and in there the amplitude is zero.

  I hope this answer helps you.

think its caste system

explanation:

answer; elasticity of the lungs decreases;