Decide or chose? Which is better?

Actually, do you even know the difference?

So many colorful chairs! Which one do I choose? Photo taken at Kure Beach near Raleigh, NC. Story behind the photo below the post. ©Kat Nieh

My mentor/publisher, Raymond Aaron, taught me that your word choices are very crucial in communicating your thoughts properly. However, we often misuse words by assuming what the definition of the word is. And if people do not have a similar sense of what that word means, it could lead to further miscommunication. Yikes!