In this work, a detailed description of attacks in wireless sensor networks is presented and after this detailed literature review on the related approaches is resented. The review of different approaches and their methodology helps to improve the methodology of the work and helps to enhance the knowledge related to different types of attacks and their solution on WSN. This work presented the work on the optimization of energy and reduction in delay and packet loss during the communication on network. The optimization performed by using the grey wolf optimization algorithm which is a global optimizer that optimizes the results for effective and efficient outcomes. It improves the packet delivery rate, throughput, and reduces energy consumption and delay.