Loose-fitting clothes are suggested for activities that a.) involve a full range of motion
b.) use any kind of equipment
c.) occur mainly outdoors
d.) involve the use of technology

Loose-fitting clothes are suggested for activities that involve a full range of motion (option a).

Explanation:

Wearing loose clothing during physical exercise has many benefits, including allowing good blood circulation and improving performance in activities that require a wide or full range of motion.

Physical exercise involves fitness activities, which contribute to maintaining health. To be able to perform them properly, some requirements must be met, being the use of adequate clothing one of the main demands.

The other options are not correct because:

    b. The use of any type of machine is not necessarily related to clothing.

    c. Loose clothing can be used both indoors and outdoors.

    d. The use of loose clothing is not related to technology.

i believe it is the last one. im sorry if im wrong!