Answer:
Sunshine provides much-needed vitamin D and also makes us feel good.
The prepositional phrase for this sentence is "go until Friday." The word "go" is a preposition. Think of it as a squirrel and a log. To find a preposition, say "The squirrel (went) [insert preposition] the log." If it makes sense, it is a preposition. Then just find the phrase to go along with it!
Answer:
He herds his sheep to the best pastures, allowing him to fulfill his obligations while also fulfilling his desire to fly.
Hope this helps!
Have a great day!