Answer:
banging nails into wood: High
feet of camels : low
snow shoes : low
feet of wading birds: low
blades of scissors : high
wide straps on a rucksack: low
blade of a knife: high
Explanation:
From the definition of pressure:
Pressure is the ratio of force to area.
Pressure is high if area is small and vice versa. Assuming that the force is the same.
banging nails into wood: High
feet of camels : low
snow shoes : low
feet of wading birds: low
blades of scissors : high
wide straps on a rucksack: low
blade of a knife: high