BRAINLIEST FOR CORRECT ANSWER

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

Decomposition is the cycle at which bacteria breaks down any organic material into the soil

The answer is b because c don't explain why the moths are on them and it isn't a because as we know only one species of moth does this

Sorry i dont understand the question can you rephase it?