Tamara is a group leader and recently she made a suggestion to her group members. while they did not all fully support the idea, they wanted to avoid conflict with tamara, so there was very little disagreement in the brief discussion. thus, she was sure that the group was all in a:

Group-think

Explanation: Group think is the behavior of thinking in a group to make a decision on any particular subject.This method of thinking decreases the  quality of decision, suppresses the opinions and thoughts of group members ,issue are ignored etc.

In accordance with question's case, Tamra thinks that decision made by her group is based on group-think The members of the group are not putting up their opinions so that dispute is not caused even though they think some of the ideas raised by Tamara are not appropriate.

so you know what happened be fore you were alive

explanation:

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.