What are the keywords in the following sentence? family packs the car for a trip
car, family, pack

What are the keywords in the following sentence? tractor making bales of hay in a field
bale, field, hay, tractor

What are the keywords in the following sentence? A skier bends his knees as he descends a slope.
descend, skier, slope

What are the keywords in the following sentence? models walk the runway as part
model, part, runway, walk