The city of harappa was located along a tributary of the river.
a. nile
b. indus
c. tigris
d. euphrates

Harappa is an ancient city and a current archeological site in Pakistan, next to the Ravi River. The Ravi River is a tributary of the Indus river - so the correct answer is b) . The valley in which Harappa is located is called the Indus valley -named after the river.

Iwould say d. eye contact and body language because you aren’t using any spoken communication. hope this : )