Question

whoa, hold your seahorses! they have a tail and a head that looks somewhat like a horse. they live in the sea. so, seahorse is not a totally unexpected name for this unique fish that is found in seas around the world. seahorses are bony fish that do not have scales like other fish. their bodies are covered with a thin skin. the skin covers rings of bony plates. seahorses swim upright—like they are standing and swimming at the same time. however, this unusual swimming position means they are not fast swimmers. the main idea is seahorses ______ have bony rings under their thin skin. swim upright just like other fish. are unique fish that are found around the world.

Explanation:

El texto habla sobre las características y ubicación de los caballitos de mar, enfatizando que son peces únicos. La idea principal debe resumir esto. La primera opción solo menciona las aletas, la segunda dice que nadan de manera similar a otros peces (lo que no es la idea principal), mientras que la tercera opcion resume que son peces únicos encontrados en todo el mundo.

Answer:

are unique fish that are found around the world.