A student is studying a digital diagram of a fish. The diagram shows that the fish has a cartilaginous skeleton, a jaw, scales, and a backbone. Which fish is the student most likely studying?

a skate because it has a cartilaginous skeleton and a jaw

a salmon because it has

scales and a backbone

a ray because it has a jaw and a backbone

a seahorse because it has a cartilaginous skeleton and scales

a ray because it has a jaw and a backbone

Explanation:

Ray fish is considered to be in class Chondrichthyes, and are characterized by their enlarged, winglike pectoral fins, cartilaginous skeleton, jaw, scales and backbone. Ray fish is in the same family as Sharks, however very smaller. It has a stinging pines which is considered as backbone.

It is not seahorse, because seahorse has no cartilaginous skeleton.

It is not Salmon, because it has no cartilaginous skeleton

It is not skates either, because skates has no backbone.