Zac is telling clarissa a story and clarissa opens her mouth as if to say something back before zac has finished talking. clarissa is the conversation.

Regulating

Explanation:

In social interaction, regulating a conversation refers to every actions that we can make in order to control the flow of conversion into something that we favour.

This can be done with things such as cutting other people off before they finish talking (like Clarissa did to zac) , using our authority to silence our conversation partner, or even simply by using some sort of  threat.

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.