This may not be right but probably the big effect was it killed alot of people.
Answer:
Corroboration. When you are analysing a source, it is helpful to compare what information it provides when compared with other sources. This helps you to more successfully evaluate your sources, especially in regards to their accuracy.
Explanation:
Inter cellular communication involves transmission of information among cells of the body which are located far apart while intra cellular communication involve transmission of information within a cell. the correct answer to this question is 'a message is distributed across plasma membrane', this is because that is an example of intra cellular communication.