Which of the following elements of climate is used in the Greek System of climate classification?

The Greek System of climate classification is based on temperature, which is the main element used to classify different climates. This system divides climates into three main categories based on average temperature: the tropical, temperate, and polar climates. Within each of these categories, there are further subdivisions based on temperature and other factors such as rainfall, humidity, and pressure. For example, the Mediterranean climate is a subdivision of the temperate climate category and is characterized by mild, wet winters and hot, dry summers. Therefore, the element of climate used in the Greek System of climate classification is temperature. While other factors such as rainfall, humidity, and pressure are considered, they are not the primary factors used to classify climates in this system.