Question

for the tarsier!
the tarsier has huge eyes for night vision.
the blue - ringed octopus
the blue - ringed octopus moves to the top of its class for its smart use of poison. this sea creature is hard to spot, because it is only about the length of a pencil. its one of the most poisonous animals in the world, but it might not even make its own venom!
what makes the blue - ringed octopus hard to see?
the blue - ringed octopus is hidden by its venom.
the blue - ringed octopus is the length of a pencil.
the blue - ringed octopus is at the top of its class.
the blue - ringed octopus is extremely poisonous.

Explanation:

To determine why the blue - ringed octopus is hard to see, we analyze each option:

• Option 1: Venom is for defense, not for hiding, so this is incorrect.
• Option 2: The text states "This sea creature is hard to spot, because it is only about the length of a pencil." This option explains the reason for it being hard to see.
• Option 3: "Moves to the top of its class" is about its use of poison, not about being hard to see.
• Option 4: Being poisonous is a characteristic of its defense, not related to being hard to spot.

Answer:

The blue - ringed octopus is the length of a pencil.