The NCF (National curriculum framework) 2005 is published by NCERT (National council of educational research and training) which explains the changes and new ways by which teaching and learning can be enhanced.Science emphasizes social endeavor. social endeavor is that which focuses to build relations.?Example: Scientists working together.?Science is dynamic in nature so that it expands the body of knowledge and covers new areas of experiences.According to A.J. Balfour, Science is an instrument of social change because its object does not change but knowledge may be changed related to the object.So option (3) is correct.?Important Points Additional InformationObjectives of teaching science in schools according to NCF 2005:To encourage the student to learn about nature.To improve divergent thinking skills.To connect the curriculum with the daily routine through hands-on activities.