Since the instruction told to provide only one solution, you may only select one for your answer to each item.
Health Risk
Limit your screen time (the time of using computers and other electronic devices) and use those breaks to do physical activities to reduce your risk of muscular atrophy.
You may also do the 20-20-20 rule. Look at something 20 feet away, for 20 seconds, every 20 minutes. Rest for 15 minutes. After 2 hours of continuous screen use, rest your eyes for 15 minutes. Move away from your computer and focus on objects that are closer and further away than your digital screen. This is to prevent eye strains.
EnvironmentConcerns
Take an extremely good care of your computer. Producing the components of a computer not only produced greenhouse gases that are known to be harmful for the environment, but also produced extra wastes that are left unused.
Usage of Power
Limit your screen time. If you have important tasks to be done with a computer, hurry up in doing those tasks to minimize your time of usage. You can also set your computer settings to reduce power consumption.
Invasionof Privacy
As much as possible, never give anyone your confidential information on the internet. This includes your personal identity, your location, and your credit card number.
Be careful in downloading media files and visiting websites. Be wary of the risk of acquiring malwares that could breach in your personal computer's data.
Answers & Comments
Since the instruction told to provide only one solution, you may only select one for your answer to each item.
Health Risk
Environment Concerns
Usage of Power
Invasion of Privacy