D. All of the above. I might be wrong but that seems like what would make sense
The first country that came to mind was Canada.
To go against opposing forces with a stronger force to help fight them
Gas hydrates are solid, icelike structures composed primarily of methane that are formed in high-pressure locations such as the deep-ocean floor
<u>Explanation:</u>
Gas hydrates are crystalline ores that make during below molecular mass gas merges with water and turns into a solid following low temperature and average pressure circumstances. Their breakdown can discharge massive quantities of gas, which could influence Earth’s climate.
It is not steady at average sea-level pressures and temperatures, which is the initial reason that it is a provocation to examine. The hydrate reservoir may have an influential impact on the atmosphere and climate because methane is a vital greenhouse gas.
Answer:
They continue to migrate to America because they can have a better life or for their kids to have a better life.