An example of external conflict in "the lottery" is:

1 Our dive program... 2 local dives 3 a annual... an Mediterranean ?

4 further afield, while our also 5 used all... 6 a Caribbean Sea 7  members and

Explanation:

1 Dive is an adjective to program so the participle diving is better.

2 Local (diving) excursions is more accurate.

3 The correct form of the article is an annual  and  a Mediterranean one refers to one of the local 'dives'.

4 Skip the afield replace while for and and also refers to something else that is not mentioned.

5 Used all wants to impress but it is better to note that the diving association works with charter boats.

6 The Caribbean Sea because there is only one.

7 Replace and for with.

But I´m sure there are more mistakes in this text...