A city is a relatively large and permanent human settlement. Although there is no agreement on how a city is distinguished from a town within general English language meanings, many cities have a particular administrative, legal, or historical status based on local law. Cities generally have complex systems for sanitation, utilities, land usage, housing, and transportation.
A mountain is a large landform that stretches above the surrounding land in a limited area, usually in the form of a peak. A mountain is generally steeper than a hill. Mountains are formed through tectonic forces or volcanism. These forces can locally raise the surface of the earth. Mountains erode slowly through the action of rivers, weather conditions, and glaciers.
There are three main types of mountains: volcanic, fold, and block. All three types are formed from plate tectonics: when portions of the Earth’s crust move, crumple, and dive. Compressional forces, isostatic uplift and intrusion of igneous matter forces surface rock upward, creating a landform higher than the surrounding features.
Autumn, interchangeably known as fall in North America, is one of the four temperate seasons. Fall marks the transition from summer into winter when the arrival of night becomes noticeably earlier and the temperature cools considerably. One of its main features is the shedding of leaves from deciduous trees.
However, according to the Irish Calendar, which is based on ancient Gaelic traditions, autumn lasts throughout the months of August, September and October, or possibly a few days later, depending on tradition. In Australia and New Zealand, autumn officially begins on 1 March and ends on 31 May.
In Ancient Greece and Rome, festivals such as the Saturnalia were closely associated with social organisation and political processes as well as religion. Food is such a vital resource that many festivals are associated with harvest time.
A meeting is a gathering of two or more people that has been convened for the purpose of achieving a common goal through verbal interaction, such as sharing information or reaching agreement. Meetings may occur face to face or virtually, as mediated by communications technology, such as a telephone conference call, a skyped conference call or a videoconference.
Thus, a meeting may be distinguished from other gatherings, such as a chance encounter (not convened), a sports game or a concert (verbal interaction is incidental), a party or the company of friends (no common goal is to be achieved) and a demonstration (whose common goal is achieved mainly through the number of demonstrators present, not verbal interaction).