Question

read the preamble to the constitution
we the people of the united states, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defence, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this constitution for the united states of america.
in the preamble, the phrase establish justice, insure domestic tranquility means
to improve the government system and structure
to create a system of laws for internal peace
to identify the seat of power in the government
to install this government system for the nation

Explanation:

Establishing justice refers to creating a fair - law system, and insuring domestic tranquility means maintaining internal peace. Together, it implies creating a system of laws for internal peace.

Answer:

to create a system of laws for internal peace