Shoe
Sound travels better at the foot of the mountain, because the air at lower altitudes is more dense than at the top of the mountain.
Light always travels in straight lines. When it encounters a boundary between different indices of refraction, the straight line may change to a different direction.
Light travels 1/1000 of a foot in a picosecond.
The property that light always travels in straight lines.
Heat always travels from Hot to cold and Heat rises Hope that answers your question
On foot
it travels by foot
hiker
Pedestrian
foot
Naill always travels with the one direction members
99% of the world's population
foot
That would be a pedometer.
Always longitudinal.
Pears!
A stamp