Peer assessment is a process whereby students or their peers grade assignments or tests based on a teacher's benchmarks. The practice is employed to save teachers time and improve students' understanding of course materials as well as improve their metacognitive skills. Features of peer assessment:Enhance students' learning through knowledge diffusion and exchange of ideas. Develop social skills like leadership, cooperation, and teamwork in the students.It focuses on students assessing other students in pairs or groups and provides effective feedback.Empower students to take responsibility for and manage their learning. Enable students to learn to assess and give others constructive feedback to develop lifelong assessment skills. ?Hence the statement "It focuses on students assessing other students in pairs or groups" defines peer assessment in EVS.Additional InformationOn the other hand, all the remaining options are wrong as they talk about self-assessment and assessment during activity but not about student pairs which is the core of defining peer assessment.