Influenza, or the flu, is an infectious disease that affects mammals and birds. the flu cannot be treated with antibiotics because
a.
it is caused by two unique strains of bacteria.
b.
it is caused by a fungus, not a bacterium.
c.
it is caused by a virus, not a bacterium.
d.
it is caused by a highly resistant strain of bacteria.

C. It is caused by a virus, not a bacterium

Explanation:

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.

rocks and weathering-matching