Assessment is done to determine the outcomes (what students have learned), process (the way they learned), and their approach to the learning before, during, or after the program or course.It is a process-oriented approach that is used to identify the areas for improvement in the learning process. Assessment tools or techniques are materials or processes that enable you to collect data for your chosen method of assessment.Such tools provide information that is used to determine whether a planned learning outcome has been achieved or not.The tools or techniques of assessment in EVS at the primary level:Project work It refers to a series of task that needs to be done by a group of learners to achieve a particular goal.It promotes the voluntary participation of learners and emphasizes active learning.It is used for learner-centered assessment.Field tripIt is the best approach to make learning alive. It is about taking learners to a certain place where they can earn knowledge by direct contact with real situations.It can be a trip to a museum, botanical gardens, and other explorable places that have educational implications.The teacher can observe learners while they explore, observe, gather information, and data about their surroundings.Journal writing It refers to a form of writing, written by learners to record their insights, perceptions, experiences, etc. on a specific topic.It helps them in organizing their thoughts and allows them to reflect on themselves.Concept mappingIt is a pedagogic technique to help learners to check explicitly how new concepts can be related to previously learned concepts. Concept maps are graphical tools for organizing and representing knowledge.It can be in the form of flowcharts, tables, Venn diagrams, etc. Hence, all of the above are correct as they all help in collecting data and information about the learning outcomes of a learner.