Please capitalize where necessary: they can spend days or even weeks between feedings.
A: They can spend days or even weeks between feedings.

Q: when the bolsheviks began to consider the project it was included within the jurisdiction of goelro, the program for the electrification of russia.

A: When the Bolsheviks began to consider the project it was included within the jurisdiction of GOELRO, the program for the electrification of Russia.

Q: yrke: american socialite, author, actress, and singer
A: Yrke: American socialite, author, actress, and singer

Problem: the player controls the hero through scrolling environments, battling incoming enemies, avoiding traps and all sorts of dangers while picking power ups.
Can you repeat this sentence, but capitalize it?
Answer: The player controls the hero through scrolling environments, battling incoming enemies, avoiding traps and all sorts of dangers while picking power ups.

Text: the sheep are the same as those on holbein's woodcut from the old testament (picture to the left).

Correct capitalization: The sheep are the same as those on Holbein's woodcut from The Old Testament (picture to the left).

Problem: previous spain: adolescent stress and second-hand smoke
Can you repeat this sentence, but capitalize it?
Answer:
Previous Spain: Adolescent stress and second-hand smoke