After you check your text materials and perhaps this website, I'm sure you can answer this question.
We'll be glad to comment on your answer.
What is HRM?
What do you mean by "change management techniques?"
Provide a example of a large company of necessary changes resulting from growning technology demands.
You probably mean that "change management techniques" are those that help a company make changes that include the newest technologies.
This sentence from the above website may help clarify it for you.
"The objective of Change Management in this context is to ensure that standardized methods and procedures are used for efficient and prompt handling of all changes to controlled IT infrastructure, in order to minimize the number and impact of any related incidents upon service. Changes in the IT infrastructure may arise reactively in response to problems or externally imposed requirements, e.g. legislative changes, or proactively from seeking imposed efficiency and effectiveness or to enable or reflect business initiatives, or from programs, projects or service improvement initiatives. Change Management can ensure standardized methods, processes and procedures are used for all changes, facilitate efficient and prompt handling of all changes, and maintain the proper balance between the need for change and the potential detrimental impact of changes."
In other words, all companies need to use standardized ways of handling new technologies.