Self-study
When so many oysters died off the coast of Britain that some native species were threatened with extinction, the fact that the water temperature had recently risen was at first thought to be the cause. ██████ ████████ ███ █████ ███ ██████████ ██ ██ ███ ████████ ████████ ███ ██████ ████ ██ ████ █████████ ███ ███ █████ ██ ██████ ███████████ ████ ██████ ███ ███ ██████ ██████████ ████ ████████ ████ ███████ ███████ ███ ███ ███████████ ██ ███ ██████████ ██████ ███████ ████ ███ ██████
"Surprising" Phenomenon
Despite the ban on TBT, which had caused a decline in the native oyster population, the now-endangered oysters haven’t recovered.
Objective
The correct answer will be a hypothesis that explains why the TBT ban didn’t help the endangered oyster population as expected. That explanation must provide some new problem facing the oyster population after TBT was banned, or some reason that TBT was in some way useful to the oyster population. The result must be that the oyster population didn’t rebound.
Analysis by AlexandraNash
13.
Which one of the following, ██ █████ ████ █████ ██ ███████ ███ ███████ ██ ███ ██████ ██████ ███████████ ██ ████████
a
The increase in █████ ███████████ ███ ██████ ██ ███ █████ █████ ███ ███████████ ███ ███████
b
Native oysters rely ██ █████████ ███████ ██ ████ ████ ██ ███ █████████ ████ ████ ██ ███ █████ ██ ██████
c
TBT also killed ████████ █████████ ██ ███████ ████ ████████ ██ ███ ███████ ██ ██████ ███████ ███ ████ ███ ██████ ███ ███████
d
Other chemicals that ███ ████ ██ ██████ █████████ ████ ███ █████ ██ █████ ████ ██ ████ ██████ ██████ ██ ███ ██████ ████████████
e
TBT is more ██████ ██ ███████ ██ ██████ ██████ ████ ██ ██████ ███████