How does the gerund function in the sentence?
- our field, engineering, has made great advances in fire safety.
a) direct object
b) an appositive
c) subject
d) indirect object

1.the hosts on two opposing mountains stood,  

2.thick as the foliage of the waving wood;  

3.between them an extensive valley lay,  

4.o'er which the gleaming armour pour'd the day,  

5.when from the camp of the philistine foes,

6. dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,