Jean Piaget was the one who came up with the <span>four stages of intellectual (or cognitive) development and these are sensorimotor, pre operational, concrete operational and formal operational. The state in which a child has developed object permanence by the end of the sensorimotor stage. Hope this answers your question.</span>
Uncrewed space missions cost less to retrieve the same information from space, it also has little to no risk towards human life.
Crewed space missions have an enormous cost, due to the tons of foolproof equipment to keep the humans alive.
Some scientist complain that there is nothing better in a space mission than human intelligence, as only humans can prepare for the unexpected. However at the cost is not available for all space missions.
Hope this helps, if you need any more information, don’t hesitate to ask