Alan is a 47-year-old man who has no documentation of a primary series of tetanus-containing vaccine. which of the following would be an appropriate primary series for alan?

Explanation:

For people 7 years of age and older who have not been previously immunized against tetanus, WHO recommends a 3-dose primary vaccination series with tetanus-diphtheria containing vaccine followed by 3 booster doses, to be protected throughout life.

The appropriate primary vaccination series is as follows:

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.