यह विश्वास कि भौतिक वस्तुओं जैसे कि गुड़िया, कार आदि में सजीव गुण होते हैं, क्या कहलाता है?

Assertion (A): Four-year-old Riya cannot take into consideration the height and width of the two beakers at the same time while pouring the same amount of water into tall and wide beakers. Reason (R): Riya is at the Preoperational stage of cognitive development as per Jean Piaget. Choose the correct option.

According to Jean Piaget, a child's ability to solve conservation problems depends upon an understanding of which basic aspects of reasoning?