4 is the one that makes the most sense i think
It’s not good because the snakes kill rodent the might eat or destroy the livestock
C. Teacher would be the correct answer
While A and B often work in . a school environment, a teacher is the best option.
~I hope this helps!~

1) x=9, because we can use the Pythagorean theorem, x^2 + 144 = 225, x^2 = 81
2)
, because 6^2 +6^2 = 72, 
3)
, because 
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Hurry and bury it or throw the body in the river or in the trash can