Question

$a$. Squeezing a piece of lemon between the fingers to extract its juice.
$b$. Taking out paste from a toothpaste tube.
$c$. A load suspended from a spring while Its other end is on a hook fixed to a wall.
$d$. An athlete making a high jump to clear the bar at a certain height.

Answer 1

Below is the explanation.
a. The fingers are the agents, lemon is the object. The effect of force is the lemon juice being expelled by squeezing.
b. The hand is the agent, toothpaste tube is object and the coming out of paste from toothpaste tube is the effect of force.
c. Suspended load is agent, spring is the object, the effect of force can be seen in the form of elongation of spring on suspension of load.
d. Athlete is the agent, bar is the object. The force can be seen in the form of jump