10. Which of the following is an example of a fixed joint? A. Elbow joint
B. Hip joint
C. Finger joint
D. Skull bone

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Explanation:

hip joint

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D.skull bone

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.

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation: