is the tendency to regard one's own ethnic group and culture as superior to others and to believe that its customs and way of life are the standards by which other cultures should be judged.

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.