What is the passage mainly about? a. orb-weavers build a new web every day. b. spider webs are lightweight but tough to remove. c. spiders use silk to capture victims in their webs. d. spinning an orb-weaver's web is hard work. most of us have seen the webs of orb-weaver spiders. they can be found in forests or even inside our homes. the webs are circular in shape, like a wheel or orb. we don't often stop to consider all the hard work that goes into spinning these webs. the process involves many steps. it begins when the orb-weaver releases a single strand of silk into the air. the strand is strong but lightweight, so that a small gust of wind can carry it toward an object like a nearby tree branch. the spider secures the strand and then walks along it until it reaches the strand's mid-point. from there it releases a second strand, making a "y" shape. next, the spider attaches many strands of non-sticky silk to nearby objects. these are the support beams of the web. the last stage of construction is when the spider weaves a final spiral of sticky silk. this sticky center is where the spider hopes to capture its victims. some of the webs that orb-weavers build are huge, which makes it all the more impressive that orb-weavers build a new web every day! generally, towards evening, the spider eats the old web. it then rests for approximately an hour, after which time it spins a new web in the same general location. considering all the hard work that goes into constructing these webs, perhaps we ought to stop and admire them every now and again, rather than simply knocking them down with a broom.