input question: How can I keep a room from getting too dry?

output answer: Use a humidifier.

input question: To cut the bread rolls in half for the cheap pizza bread

output answer: Stand a loaf vertically and use your knife to gently saw it in half.

input question: To trim excess branches off of a tree,

output answer:
use a pair of tree clippers to cut the branches off as close to the main trunk as possible. Cut in the early spring to minimize damage to the tree.