By what age can most children classify objects they see? four years six years two years eight years

The right answer is at age 7. The classification of objects is the ability to recognize the differences and the similarities of the different objects that surround us. When we are born we do not have this ability which is acquired as the brain develops. This skill is acquired gradually, so children will learn from a young age how to group certain things, but they will specialize at age 7.