How are blue and red litmus papers alike? They both change color in acids.
They both change color in bases.
They both turn purple in neutrals.

3.

Explanation:

Both red and blue litmus papers are changing color in acid and the main use of them is to test whether a solution is basic or acidic.

Under acidic conditions, blue litmus paper will turn red, and red litmus paper will turn blue under basic conditions.

Purple litmus paper is always neutral which means that blue and red will always be purple in neutral environment.

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.

i believe the answer is a or 1