Question

between 90-95% of all animals on earth can be classified as ------. options: invertebrates, vertebrates, reptiles, mammals.

Explanation:

In the animal kingdom, invertebrates (animals without a backbone) make up the vast majority of animal species. Estimates show that between 90 - 95% of all animals are invertebrates. Vertebrates (like reptiles and mammals) are a much smaller portion of the animal population.

Answer:

A. invertebrates