Adifference between a political party and an interest group is that the main goal of

A difference between a political party and an interest group is that the main goal of a political party is to gain more power and positions in government by means of elections, while the main goal of an interest group is to convince politicians to support the interests and the position of the group on a particular issue which is usually controversial.  

Explanation: A political party focuses on winning elections so as to have more power and hold positions in government which will allow them to make decisions that will eventually affect the future of a country. On the other hand, an interest group does not seek to win an election but to make the people that occupy a position in government support the group's interests and share the group's points of view.  Therefore, an interest group generally seeks to convince politicians of voting for or against a particular policy. Members of an interest group usually do not hold positions in government.

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -