Interaction design is a process for designing interactive to support the way people communicate and interact in their everyday and working lives.
select one:
a. softwares
b. systems
c. products
d. machines

Product

Explanation:

Interaction design is a practices of designing interactive digital products and services in such a way it perfectly or closely mimic the way humans communicate and interact in real life scenario. or it can be rephrased as creating a user experiences that augment the way people work, communicate and interact.

interaction design sometimes goes beyond just creating digital products it also useful when creating physical ones.

answer; i do believe its (d) modem;

i believe the answer would be b. within an intersection or on a crosswalk. hope this ! : )