More people began to arrive in the state of new south wales in australia during the mid-19th century because
a) slavery was made illegal.
b) there was a massive gold rush.
c) the war in the americas ended.
d) the country gained independence.

d) a constitutional amendment

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.