What text structure is the following passage?

Question

When a wildfire breaks out, there are several steps to stopping it before it can spread further, called wildfire suppression. First, teams attack the fire by applying fire retardant on flames and around unburned areas. This prevents the treated land from catching fire when the fire travels in that direction. Then, firefighters on the ground fight fire with water, by removing as much fuel as they can (like leaves, furniture, or anything else that may catch fire), and by digging trenches that flames can’t jump. When the flames go out, firefighters “mop up” the land by cooling areas that are still smoldering.

a
Description
b
Sequence
c
Compare/Contrast
d
Cause and Effect

Answer 1

b
Sequence