Over a life time of an individual intelligence tends to increase. You learn more things that will have more value then the things you learned earlier in life.
Explanation: Bhakti soon spread to North India, appearing most notably in the 10th-century Sanskrit text the Bhagavata-purana. Muslim ideas of surrender to God may have influenced Hindu ideas of bhakti from the start, and later poet-saints such as Kabir (1440–1518) introduced Sufi (mystical) elements from Islam.
D. Fighting to take land from other colonies
Pre-history refers to the period before humans begin to document information.
It is important that human study pre-history because it can give him insight into the origin of life and how life was developed on earth. Pre-history makes one to understand how the earth develop to the stage it is today and it gives one an idea of what could possibly happen in the time to come
