Most European countries decided to join together for economic reasons. They created a common currency and an economic ideology that benefits each member.
The name of this group is the -
A) Warsaw Pact
B) European Unification
C) European Union
D) NATO

Correct answer is C) European Union .

Explanation:

Option A is not correct as the Warsaw Pact was a military alliance of Communist countries in Europe that existed during the Cold War.

B is not correct as this is an idea not an organization or agreement.

D is also not correct as NATO is also military organization that includes countries outside Europe.

C is the only correct answer as EU is a political, economical organization whose goal is to create a free market for people and goods across Europe.

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.

reflecting point a across the origin negates both of its coordinates.

b = (5, -4)