Answer:
Step-by-step explanation:
Are insects glued to one spot? Think of the mosquito which can land on anything with blood and get what they need. They can also walk around to look for a nice juicy conduit.
Spiders -- same story. They spin their webs and wait to see what hits the webs.
What about the octopus, which has 8 legs to propel him. Almost all insects have ways of moving around.