Hi!
The correct answer is : either stretch or compress the spring
Explanation
The spring constant, denoted commonly as k, is a component of Hooke's law which describes the force that is required to compress or stretch an object to be directly proportional to the length of extension or compression.
F ∝ x
where F is the force applied to the spring, and x is the length of extension or compression.
The equation of Hooke's law is consequently
F = kx
where k is a non zero constant, known as the spring constant.
Hope this helps!
