Seahorses are tiny fishes that are named for the shape of their head which (1)__the head of a tiny horse. There are at least 25 species of seahorses. They are found in the world’s tropical and temperate coastal waters, swimming upright among seaweed and other plants. Seahorses use their dorsal fins (back fins) to propel slowly forward. To move up and down, seahorses adjust the volume of air in their swim bladders, which is an air pocket inside their bodies. Tiny, spiny plates cover seahorses' bodies all the way down to their curled, flexible tails. The tail can (2) objects, which is helpful when seahorses want to anchor themselves to vegetation. A female seahorse (3)_ dozens, sometimes hundreds, of eggs in a pouch on the male seahorses’ abdomen. Called a brood pouch, it (4) __ a kangaroo’s pouch for carrying young. Seahorse young hatch after up to 45 days in the brood pouch. The baby seahorses, each about the size of a jelly bean, find other baby seahorses and float together in small groups, clinging to each other using their tails. Unlike kangaroos, baby seahorses do not return to the pouch. They must find food and (5) predators as soon as they’re born. What is the most appropriate word to complete number 2?

Question

Seahorses are tiny fishes that are named for the shape of their head which (1)____the head of a tiny horse. There are at least 25 species of seahorses. They are found in the world’s tropical and temperate coastal waters, swimming upright among seaweed and other plants. Seahorses use their dorsal fins (back fins) to propel slowly forward. To move up and down, seahorses adjust the volume of air in their swim bladders, which is an air pocket inside their bodies. Tiny, spiny plates cover seahorses' bodies all the way down to their curled, flexible tails. The tail can (2)____ objects, which is helpful when seahorses want to anchor themselves to vegetation.

A female seahorse (3)___ dozens, sometimes hundreds, of eggs in a pouch on the male seahorses’ abdomen. Called a brood pouch, it (4) ____ a kangaroo’s pouch for carrying young. Seahorse young hatch after up to 45 days in the brood pouch. The baby seahorses, each about the size of a jelly bean, find other baby seahorses and float together in small groups, clinging to each other using their tails. Unlike kangaroos, baby seahorses do not return to the pouch. They must find food and (5)__ predators as soon as they’re born.

What is the most appropriate word to complete number 2?

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