Why does jonas feel that he must leave earlier than planned ? the giver chapter 21

The reason that Jonas decides to leave early is because he discovers that Gabriel has not made enough progress and is scheduled to be released.

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.

tik tok is way better in my oppinion