$A(n)\_$ usually provides backups of data, web hosting capabilities, and synchronization services, and has become a standard for many businesses.

a$.$ email server

b$.$ cloud service

c$.$ domain name service

d$.$ operating system

e$.$ HTML service

Ine main goal with constructing a $(n{)}_{\text{d}\text{o}\text{t}\text{s}},$ is to identify a small subset of characteristics or features that are sufficient to describe the behavior under investigation.

a$.$ model

b$.$ simulation

C$.$ program

d$.$ graphic

e$.$ animation