Answer: A
Explanation:a force is baisicly a vector that has a certain direction and magnitude the more magnitude it has in the direction its pulling the faster the object effected by it will go to it. it seldom is the stregnth with most forces it just depends on magnitude
volcanoes hope this helps
Answer:
A breakdown in trading alliances change or loss of local culture a decrease in avilable jobs
Humans can disrupt the ecosystem by for an example drilling under the ground so you can find oil well that is bad because it increases having more earthquakes.