The answer is object permanence.
Object permanence is the understanding that objects continue to exist even when they cannot be seen anymore. This is a fundamental concept studied in the field of developmental psychology. The term was coined by Jean Piaget. Jean Piaget’s theory is that children of about eight or nine months of age develop awareness/the idea that objects continue to exist even when one cannot see them. Before this stage, as far as the infant is concerned, items that are not within eyesight range do not exist.
<u>Angola adopted a new constitution with a strong central government and equal rights.</u>
Answer: Option D
<u>Explanation:</u>
After Angola gained independence from Portugal in the year of 1975 and after it gained independence, it adopted a new constitution where there was democracy and there were multiple parties who contested elections and there was a president also who was the head of the state and had powers to govern the affairs of the state. There were certain rights also which were given to the citizens to lead a peaceful life.
Over the past three decades, evidence has accumulated that even low levels of lead can slow a child's development and cause learning and behavior problems.
True
