A flatworm named _______ has very simple ‘eyes’ that are really just eye-spots which detect light.

The Correct Answer is Option 4 i.e Planaria.Planaria:It is a flatworm with very simple ‘eyes’ that are really just eye-spots that DETECT light.Flatworms are ALSO called planarians.They belong to the phylum Platyhelminthes.They are characterized by flat bodies, they have no skeleton, no circulatory or respiratory organs, ETC.Ascaris:They belong to phylum Aschelminthes.They are BILATERALLY symmetrical and triploblastic animalsIt is a type of parasitic WORM Ascariasis is the most common type of roundworm infection in humans.Tapeworm:They also belong to the phylum PlatyhelminthesThey are triploblastic animals.They are characterized by flat bodies, they have no skeleton, no circulatory or respiratory organs, etc.Liverfluke:They also belong to the phylum Platyhelminthes.They are triploblastic animals.They are characterized by flat bodies, they have no skeleton, no circulatory or respiratory organs, etc.