<span> A scaly, legless reptile species</span>
I'd choose "revise the structure of your essay by making the progression more logical."
Out of all the given answers that one makes most sense
A
Dashes are where you would pause.
Therefor you would say, "The storm seems to be over (slight pause) (thinking, no, wait, it isn't) no, the sky is darkening again."
EXPLAINS, IS
The tour guide EXPLAINS that either candles or a lantern IS used to see into the tomb.
Tour guide is singular. Therefore, verb used must be in singular form.
Lantern is singular and it is the nearest subject of the verb. Thus, the verb must also be in singular form.
