What crisis happened between japan and china in 1931 that led to the league of nations intervening?

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.

answer; genetics;

they could have terrible tropical storms which will destroy the crops in the colonies

answer; action;