Mood....if it is included in your options
A blimp needs to be moored when not flying because plenty of space is needed so the blimp has to be free. They have to be moored by the front end to a tall mast on a truck specially equipped for this purpose.
I have Aviation History so I kinda of undertsnd.
HOPE THIS HELPS. :)
A. Greatly reduced the assembly time for each car.
The subjunctive mood or the imperative mood
When doing a multimedia presentation, the thing that one might be prepared about in advance in case the equipment failure during presentation is to keep giving the speech and using the chalkboard to provide the visuals. This will keep the people interested in listening without caring about the failed instrument.