What is the purpose of putting or poking holes with the use of a needle at the bottom part of the bottle ofthe hanging garden?

a. to make the soil wet

b. to have a proper drainage

c. to maintain the moisture of the soild
d. to add decorations in the hanging garden

Nonsense=Report
Please help me
i will mark brainliest if you want
i also asked another question check in my acc it is not answered yet and i will also mark brainliest on it if your answer is correct on it :D​