Answer: b A closed system is when energy cannot pass through or pass out of something. With the lid being closed around the jar, the energy cannot be passed through. While with the other answers like d, the shell around a hermit crab is still opened a little, so energy can pass through it, not making it a closed system
At the sea shore there is less water so the sun shines directly in them, deeper. there is more water. so their bodies are more in the water therefore the sun is less in their bodies.
