I believe the answer is: <span>surprise, and the infant will stare at the spot the ball appeared to go through the wall.
In the field of psychology, this occurence is referred to as object permanence, whcih is the knowledge that an object would not dissapear even if we stop paying attention to it. At one year old, the concept of object permanence is still not fully developed yet.</span>
Answer:
Question one is D I believe. Question two is B.
Answer:
d. irrigated crops
Explanation:
In subtropical areas, irrigation led to highly developed agriculture and made it possible to achieve a yield sufficient to support a high population.
Rivers overflowing silt provided water for irrigation and enriched the soil.
Fields with irrigation and flood control require hydraulic structures in order to bring water where it is needed, when it is needed.
Technology was developed to drain swamps, build dams, levees, canals, terraces, and all this must be cleaned and maintained.
Answer:
I believe it is the gold rush of 1849
Explanation:
It helped spark up economics in the western side of the americas.
Because the allied powers were a team that were not about to break apart and the axis powers would have kept attacking them if only on of the allied powers made peace.