A.The Roman empire relied on physical features as natural barriers.
Assonance is the sound device in which vowel sounds of nearby words are repeated. These are usually found in prose and poetry, with the purpose of setting the mood.
Ex. "Hear the mellow wedding bells" in the poem The Bells by Edgar Allan Poe. In this line, the mood was set by using vowel "e" as literary device.
To students who : frequently multitask during learning situation
These types of student usually cannot miss anything in learning situation. His/her attention will always divided. For example, i'm sure you know someone in your lives who can listen to your teachers explanation while his hand is moving to make notes at the same time without switching from one task to another
C. Remote sensing because the imagery is not in direct contact