For me the answer is b. The ship crew
Watershed is probabley the answer you are looking for
Answer: Countries with more wealth have a higher life expectancy
Explanation: Countries with more wealth can have more money to spend on healthcare.
There are a lot of volcanoes,mostly along the pacific ring of fire,mt Fuji in Japan,for example
https://www.reference.com/science/volcanoes-located-along-convergent-plate-boundaries-902a6027f2e299f1#
the link has got more example,you might want to check it out
hope it helps c:
It effects most of the clothes we wear, it affects our sinuses and basically our daylight savings and time