One of Galileo’s contributions to science was creating the coordinate plane system.
developing the scientific method.
improving the telescope.
inventing the astrolabe.

Developing the scientific method.

Explanation:

The scientific method is a variety of techniques for investigating certain phenomena, to collect or correct information about the Earth, life on earth or space.   There is a set of logical rules that must be adhered to during this scientific investigation, for example that the result can be measured in some way and that the experiment can be repeated.  The scientific method was created by the Italian astronomer Galileo Galilei, who devised this system as the best way to arrive at testable hypotheses about a certain scientific question.

your answer would be a) no nation can be economically self-sufficient.

stay in school!

the correct answer is: (1) affected by gerrymandering; (2) not affected by gerrymandering.

gerrymandering is known as a practice that intends to establish a some kind of political advantage for a particular party or group. to do this district boundaries are manipulated. the new resulting district is named a gerrymandering.

in other words, what gerrymandering does is to draw the boundaries of electoral districts trying to benefit the party who is doing it. sometimes, the party controlling the legislature will redraw it so they can maximize the number of districts they are likely to control.