Answer:
its B bcz its driven by density gradient due to variation in temperature
<span>The resource curse, also known as the paradox of plenty, refers to the paradox
that countries with an abundance of natural resources (like fossil
fuels and certain minerals), tend to have less economic growth, less
democracy, and worse development outcomes than countries with fewer
natural resources.</span>
A Becuawe if you really think about it it’s A
One way would be to limit who can receive a passport or visa to travel to another country and another would be at the entrance to the country they may not be admitted for example due to inadequate funds to live. In my case, when I travelled by bus from Costa Rica to Panama, the Panamanian authorities required that I either have a ticket out of the country or a return ticket back to San Jose, Costa Rica.