When you look at the portrait of your family that hangs on the wall in your house, you tend to see an entire family—multiple members that form one consolidated group—rather than individual family members. This is true, unless you intentionally direct your focus to individual people in the photograph. This tendency to see things as a whole, rather than individual components, demonstrates the consciousness principle of:.a. unity.
b. transience.
c. intentionality.
d. selectivity.

a. unity.                                            

Explanation:

Principle of unity: The term "principle of unity" is also referred as "principle of harmony", and is described as a significant principle related to design that gives a particular artwork a sense of coherence or cohesion. It is described as completeness or wholeness of a particular picture. Unity generally measures or identifies the way different elements of an individual's design work together.

In the question above, the given statement signifies the consciousness principle of unity.

probably 3 since archeologists and historians don’t understand there writing.

well this isn't a question but if you are asking if it is true or false it is, true.