Why is carbon so special compared to other elements?
a. carbon atoms can bond to one another and form a lot of different structures.
b. only carbon atoms can be dissolved in water solutions and suspensions.
c. only carbon atoms can form covalent bonds with oxygen and hydrogen.
d. carbon atoms have four valence electrons and can form quadruple bonds.

it is not d

Explanation:

Organic chemistry studies only carbons because they have the property of bonding to one another and form some many variations of structures. Imagine the importance that a whole chemistry is dedicated to carbons.

Carbon atoms allows doctors, veterinarians, dentists, pharmacologists, chemical engineers, and chemists, to do their jobs because in these professions is involved carbon an organic chemistry.

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.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.