What happen when a environment change ?

When a environment changes everything living in the environment changes. The animals might have to find a new place to live. This could cause a change in the food chain. A change in the food chain could kill some of the animals that stayed.

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.

b is the best answer for this question.