TEEN: Threshold Sensitive Energy Efficient Sensor Network Protocol is a specific response routing protocol. (7)The main working of the TEEN protocol is that the cluster head is picked periodically, probability and randomly. The cluster head is closest to other nodes hence they join the cluster. In the stage of clustering, cluster head transmits its hard threshold and soft threshold inside the cluster. The Protocol TEEN maintains the balance between consumption of network energy and data transmission meticulousness by hard threshold and soft threshold tuning. (8)The problem of this protocol is that, if the thresholds are not achieved, the nodes will never report, the user won’t get any information from the network and have no idea even if all the nodes die. Therefore, this protocol is not appropriate for applications where the user needs to get information all the time.