<span>Because its members are so different from one another. </span>
The answer is "Life chances".
Life chances<span> or as it is called in German Lebenschancen refers to a social
science hypothesis of the opportunities every individual has to enhance their
personal satisfaction. The idea was presented by German humanist Max Weber. As indicated by this hypothesis, life chances
are emphatically associated with one's socioeconomic status.</span>
The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
This new tunnel revolutionized transportation in Europe and overcome this physical barrier because the Swiss engineers built the world's deepest and longest tunnel in the world, increasing the effectivity of train freight transportation across Europe.
We are talking about the Gotthard base tunnel, in Switzerland. According to the article "Swiss create the world's longest tunnel," was so complex to build that engineers and workers lasted 20 years to complete. It is a tunnel for trains. It has 35 miles of longitude and crosses the Alpes mountains.