Answer:
A shallow
Explanation:
Something that is described as shallow is "of little depth". The initial description given of the canal is that of a body of water that was not deep enough to allow the passage of large ships. To solve this problem of the canal being shallow, dredgers had to be used to reach the bottom of the canal, thus increasing the depth of the canal.
After this was done, an improvement was seen in the increased number of ships plying the canal water body.
Your question is very vague and therefore hard to understand but I would assume you are asking for the explanation of the pun.
This phrase is a pun because skiers ski down slopes, and going down hill is another way of saying not going very well. Old skiers never die, they just go down hill is a pun because skiers go down hills.
Answer:
Two types of eclipses are visible from Earth: an eclipse of the moon and an eclipse of the sun. I believe tats right. let me know though if I'm wrong.