Multiple choice

Which one of these is not an animal?

  1. Starfish

  2. Algae

  3. Cat

  4. Dog

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Algae are photosynthetic organisms that belong to the kingdom Protista (or are classified as plants/chromists depending on the system), but they are definitely not animals. Starfish, cats, and dogs are all multicellular eukaryotic organisms belonging to the Kingdom Animalia.