Well he looked at the contents and saw they some of them had similar shapes so
Arthropods were the first animals to successfully invade land from the sea
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C because I had the same question and my teacher said it was c
A food web has many different links; It links off into different animals. Where as a food chains just a line of single animals that eat those animals for example: like hawks eat bunnies and bunnies eat grass and grass is the producer.
hope this helps u out...good luck
