That would be trading and farming.
Answer:
<em>Zone of proximal development</em>
Explanation:
Zone of proximal development is a stage in a child's development, where the child is provided support to perform a task. It is a level in a child's development which is between the actual development and potential development. This joint learning activity is usually between the child and an older person, who acts as an educator.
<em>Stephen had unsuccessful attempts in assembling the moderately sized jigsaw puzzles on his own and with the help of his older brother he assembled it. Here Stephen engages in joint activity with the brother to solve the puzzle and he falls in the zone of proximal development</em>
Answer:
Rivers change the surface of the earth. They are the agents of erosion, deposition and transportation. When rivers flow, they erode the rock with them and strong current pushes them. ... After cutting, they carry the stone, pebbles and other solid things and when the current is slow, they deposit the load on the land.
The placebo effect is a procedure in which a patient is made to believe that a drug has a direct on the person. Therefore improving his/her symptoms from the said disease that he/she is experiencing. It is directly injecting or making a procedure using alternatives. The idea is that the patient would believe such measures were done and that they will be cured from their diseases. There are no video clips available on you questions but I hope this helps.
