The ocean and the ocean surround europe.
a. pacific . . atlantic
b. arctic . . indian
c. pacific . . indian
d. arctic . . atlantic
because almost 97 percent of the people living in poland are of polish ethnic descent, poland is a(n) society.
a. genetically diverse
b. ethnically homogeneous
c. genetically endangered
d. ethnically heterogeneous

The correct answers are:

1. d. Arctic . . . Atlantic;

- The continent of Europe, which in essence is not even a real continent but a very big peninsula of the Eurasian continent, is surrounded by two oceans, from the western side its the Atlantic Ocean, and on the northern side is the Arctic Ocean.

2. b. ethnically homogeneous;

- Poland is one of the few countries in Europe that can be considered as ethnically homogeneous country. The term ethnically homogeneous means that the population of certain country is either totally of same descent, or it is very close to the 100% of being from the same descent, and Poland with its 97% Polish population certainly falls into this category.  

the wrong statement is - c. a desert had more biodiversity than a marsh.

the deserts are one of the places of the planet where there's the least biodiversity. the reasons for that are the climate and the lack of food sources, which hampers both the number of the species that can survive in it, and the number of the individuals in the species itself.

the marshes, on the other hand, are places where there's perfect conditions for lots of organisms to thrive. the temperature is moderate and nice, the amount of water and the food sources are on a high level, so there's an abundance of both plant and animal life in them.