the question is , Draw lines between pairs of icons and write a note on the line about how those two principles might be related. Connect as many principles as you can.

by improved communication.

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.

d.

the northwest territory became the most densely populated area in the u.s.

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity