writing practice The diagram illustrates the cycle of the salmon in their lives from eggs to maturity. There are several stages in their life cycle from birth to adults in three distinct locations as they develop, moving from river to estuary to ocean and then back to the river again. The salmon begin their lives in rivers where they lay eggs and incubate them. After emerging from eggs, they are reared in the freshwater zone. Then, at some point in their development, they swim downstream to estuary areas where rearing continues. The salmon in the zone for estuary migrate to the ocean where they eventually become fully grown adults. The adult salmon move upstream to spawning area in the rivers again, where they reproduce and lay eggs. These adult salmon lay eggs again, and the eggs begin to live the same cycle which is repeated continuously.