You can increase enrollment in foreign language classes by promoting those foreign languages somehow. You need to appeal to children's interests, by showing them that learning new languages is both interesting and beneficial for them. Nowadays, knowing English is extremely important, but people who can speak more than one language tend to be more successful in life and jobs.
Xenophobia is the "fear" of people from other countries or more generally the fear of the other.
Let's take for example the currenst situation in Europe and the problem is:
"Why do many European people feel hostile towards the coming refugees?"
The objective would then be"Understand the reasons for the hostile attitude and mitigate this attitude"
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Well forest have trees and dersert dont forest also are moist while deserets are dry