Which one is the effect of television on health?

Listening through a loudspeaker instead of using earphones is one way to prevent the bad effects of mobile phones.

Which of the following is NOT a bad effect of mobile phones on health?

Place the computer where there is fresh air in order to release the heat.

Listening to music with earphones while sleeping is good for the ears.

The technology that treats disease or solves health problems

__________ is applying the scientific knowledge for practical purposes.

It is for traveling convenience.

The following are examples of transportation, except ___________.

Which one is NOT a technology?