This item represents one of the greatest sources of power for a president

Strong popular support

Explanation:

Strong popular support is seen as one of the sources of power that  can be used by a president of a country .Once the president has a larger support base or  a large group of people from his party or otherwise, The president  can initiate plans or procedures  for the betterment of the people and country.

answer; ///i believe the correct answer is (b) the writing of the ancients who lived in india after the indus valley inhabitants died out;

manifest functions are the recognized and intended consequences of any social pattern, while latent functions are those unrecognized and unintended consequences. to analyze the manifest functions of any social institution, we have to study its contribution to the continuation of a group, community, or society.