King Leopold, by the world "civilization", means European civilization, that is to say, all the economic, social, and political characteristics of the European world at his time.
Things like industry, monarchies, christianity, gunpowder based warfare, are the main characteristics of the European world at the time, and these are the things that King Leopold is referring to by the world "civilization".
A Peacock is an unusual pet that is uncommon to own, and they differ from common household pets such as a dog or cat! Peacocks are exotic animals that require special needs to be cared for properly. Peacocks need a minimum of at least 80 square feet to live healthily. An ideal living space would be an open area that allows them to roam and fly freely. Another important thing to consider is that peacocks thrive in warm environments. It's vital to keep their living area warm, especially when the weather starts to get cold. Peacock's are omnivores, meaning that they can consume both meat and vegetables. It's ideal to feed them a variety of options like fruits, veggies, and insects. However, peacocks living in zoos usually eat commercial bird feed so you can feed them that as well. Like with any of our pets, we must take care of their health. Peacock's require special attention as they are susceptible to catching worms and other parasitic diseases. They need to be dewormed every few months and this can be done by calling a farm vet or buying a dewormer made for farm animals. Peacocks are beautiful creatures that require special care, but they do make for a unique unusual pet.
The earth would go slower if the rate of rotation decreased, so the days would be longer. If you want more information on this I recommend the book 'The Age of Miracles' by Karen Thompson Walker. It's a fictional book based on this concept.