7. A certain atom has an atomic number of four. How many protons does it have? 4

8

2

0

4

Explanation:

An atom with atomic number of 4 will have a proton number of 4.

Atomic number is the number of protons in an atom. Therefore, when given the atomic number, it shows the number of protons in the atom.

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.

a and c are the answeres