Question

what is an invertebrate?
an animal with a backbone
a mammal
an animal without a backbone
birds

Explanation:

To determine the answer, we recall the definition of an invertebrate. Invertebrates are animals that lack a backbone (vertebral column). Let's analyze each option:

• "An animal with a backbone" describes a vertebrate, not an invertebrate.
• "a mammal" is a type of vertebrate (mammals have backbones).
• "An animal without a backbone" matches the definition of an invertebrate.
• "birds" are vertebrates (they have backbones).

Answer:

The correct option is the one with the text "An animal without a backbone" (the orange - colored option in the image).