Area codes are for phone numbers. Area codes are the first 3 digits of the phone number. Usually represent the area ppl live in. Example: (213) 555-6666 --> area code 213. Zip codes are for mailing addresses.
Succession is the process by which new community gets established at an area which had been uninhabited. The community which gets established at the site is called climax community. It is the aggregation of changes of species structure in an ecological community over time.
For instance, primary succession is succession that begins in an area where the soil has not yet formed. Examples of events that precede primary succession would be the formation of a new island by a volcanic eruption or the retreat of a glacier.