This is a test of commonsense with single/multi-choices. Complete the next sentence:

Men blows dead leaves pushing a leaf blower machine on the ground or holding a machine on the back. Then, a man explains how to operate a leaf blow machine while men continue blowing the leaves. another man

OPTIONS: [+] also explains how to set fire by holding a metal shingle and trunk in the air.. [+] explains while other men vacuum and blows leaves.. [+] holds a leaf blower over a black background.. [+] is shown underwater using a leaf blower and blowing dead leaves..
The answer is:
explains while other men vacuum and blows leaves.