(i) The process of motivation is based on human requirements. An unsatisfied need of a person creates tension that stimulates his drives which generates search behaviour to satisfy the particular need. The person is relieved of tension when such need is satisfied.
(ii) Grapevine communication may follow various types of network. In single strand network, every individual communicates with the other in sequence. In gossip network, every individual communicates with all others on non-selective basis. In probability network, the individual communicates randomly with another individual. In cluster network, the individual communicates with only those individuals whom he trusts.
