Labour: this refers to people, workers and manpower that make things and create services. People are also consumers and as such the largest economies tend to also have the largest populations.
Capital: this actually refers to financial and working capital (ie money in layman's term), fixed capital (equipment, servers, buildings) and
I have never studied Economics academically and always felt it was my impediment as an investor. Now that my kids are taking the subject in school, I got hold of their textbooks and took this opportunity to learn with them. Yes, learning never stops.
In the first lesson in Economics, we are taught that there are four factors of production that is needed to produce finished goods and services. These are the building blocks that form the basis of any economy. Originally, there was only three, but over time, as knowledge increases, the fourth factor was added.