Which of the following is the most accurate definition of a civilization? humans being able to communicate with each other.
humans being able to travel to other regions
the stage of humans being able to find food
the stage of human social and cultural development

The stage of human social and cultural development.

Explanation:

The stage of human social and cultural development.

on:

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

just did the assignment and the answer was #1 +2 n