Please help me on question 15

So,

a) The nature lover strolled through the woods.
b) The lame man limped across the floor.
c) The happy couple sauntered down the lane.
d) The daring knight strode into the hall.
e) The tourist paced through the art gallery.
f) The soldiers strutted to the station.
g) Captain Smith marched up and down the deck.
h) The cunning thief sneaked into the room.
i) The baby toddled across the floor.
j) Proud Mr. Brown rambled on to the platform.
k) The weary farmer tramped homewards.