The carbon, oxygen, water, and nitrogen cycles all work together to keep earth's ecosystems in balance. describe an investigation modeling a problem that would affect all the cycles? if you answer my question correctly then i will mark you brainliest and free points.

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided