Final answer:
Option B uses correct semicolon mechanics by connecting closely related clauses about Wildleaks and its requirements.
Step-by-step explanation:
The correct use of semicolon mechanics is shown in option B: Wildleaks is a whistle-blower website where people anonymously report illegal wildlife trade; the site may prove effective in the fight against wildlife crime; however, it requires internet access in order to be useful.
A semicolon is used to join two independent clauses that are closely related. In this case, the semicolons are used to connect three independent clauses that provide related information about the website Wildleaks and its requirements. The use of semicolons in this structure helps to create clarity and avoid confusion.