What lesson does the fable teach?

Measurements help us adapt to forces we cannot control, but drawing a boundary does not command reality. (The crab fails when treating a mark as an order and succeeds when using several observations to relocate food.)

Why does the crab dislike the oyster's answer?

It has invested effort in the line and does not want to admit the line lacks control. (The story links the crab's resistance to the entire morning spent making the line.)

What does “record” mean in the oyster's statement?

preserve information about what happened (The oyster contrasts documenting a past water level with controlling a future one.)

What does the crab move above the highest mark?

loose food (The final paragraph states that loose food is moved to a safer height.)

The Crab Who Measured the Tide: Level 2 Reading Comprehension Questions

A crab drew a line in the sand beside its burrow. “The sea may come this far,” it announced, “but no farther.” At low tide, the line looked official.

The water returned. One wave stopped below the mark, and the crab praised its measurement. The next crossed it. The crab rebuilt the line higher and ordered the sea to obey. Soon foam washed over the burrow.

An oyster called from a rock, “Your mark can record where water went. It cannot command where water goes.” The crab disliked this answer because the line had taken all morning.

At the next low tide, the crab tried again. This time it marked several past water levels and moved loose food above the highest one. The sea still ignored every line, but the crab's plan no longer depended on obedience. A measure became useful when it helped the crab adapt to the tide instead of pretending to rule it.

Comprehension questions