What's the answer to this: Which of the following best describes what the pie chart shows? A.
Changes in human activities can help reduce greenhouse gas emissions.
B.
Methane emissions can be reduced by using natural gas and petroleum systems.
C.
Methane emission can be decreased by creating more landfills.
D.
The amount of methane in the atmosphere does not depend on human activities.

Muscle fiber i think that i right

This is a solution, hope i could

Electron equations of the given changes are as follow,a)                              cu      →      cu⁺²  + 2e⁻b)                              mg⁺²  +  2 e⁻      →      mgc)                              cl⁻    →      cl  +  1e⁻d)                              s  +  2 e⁻    →      s²⁻e)                                o²⁻      →      o  +  2 e⁻f)                              p  +  3 e⁻    →      p³⁻g)                              fe²⁺    →      fe³⁺  + 1 e⁻h)                              s²⁻    →      s⁴⁺  +  6 e⁻