:Complete the paragraph below choosing the correct answer from the box below.
Animals are grouped into vertebrates and _______ Vertebrates are animals with a_______ Whereas invertebrates are animals without a backbone. A backbone is the column of bones, muscles, and other tissues in the back of an animal. Insects and spiders belong to the same class of invertebrates called_______. An insect has three main parts. The_______ is in the front. The chest is the next part. The_______is behind the chest. Insects have six legs, three on each side. Most of them have wings attached to the chest
