what is the main type of tectonic plate boundary that exists along the edge of the north american plate near the coast of northern california, oregon, and washington?

i need more info to answer

the value of the 4 in the hundreds place is 400 while the value of th e 4 in the tens place is 40

400 is way bigger than 40.

i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )