Horses sleep while standing, unless it is necessary for them to get REM sleep. The amount of REM sleep needed is not much, so they will spend most of their time when sleeping, standing.
Answer: so diamonds are important to use for tools
Explanation: One of the most common uses of a diamond, besides being made into jewellery, is the use of it in the industrial industry. Due to a diamond's remarkable strength, they have become extremely effective as cutting, polishing and drilling tools.
The answer is B. The hawks no longer have competition and the rabbits have one less predator.