VOCABULARY — Choose the antonym (opposite in meaning) of the highlighted word. Sentence: “The bedroom is at the REAR side of this house.”

Introduction / Context:
In this vocabulary task, you must pick the word that is opposite in meaning to “rear” as used in spatial descriptions of a house. “Rear” refers to the back or hind part of something; therefore we are looking for the opposite location term.

Given Data / Assumptions:

• Context is physical orientation of a house.
• “Rear” is used attributively to mean “back side”.
• Answer choices include common spatial adjectives.

Concept / Approach:
Antonyms are words with opposite meanings. In spatial pairs, “front” is the conventional opposite of “rear” (rear/back ↔ front). Words like “upper” describe vertical position, and “unusual” is unrelated to position.

Step-by-Step Solution:
1) Identify the sense of “rear”: physical back side of a structure.2) Map to its canonical opposite: “front”.3) Check distractors: “upper” is vertical; “back” repeats the meaning; “unusual” is off-topic.4) Confirm the choice that reverses the direction along the same axis: “front”.

Verification / Alternative check:
Paraphrase the sentence: “The bedroom is at the back side of this house.” The opposite statement would be “The bedroom is at the front side of this house,” confirming “front” as the antonym.

Why Other Options Are Wrong:
A) “unusual” — not a spatial term; unrelated to position.C) “upper” — vertical orientation (up/down), not front/back.D) “back” — same meaning as “rear,” not opposite.E) “None of the above” — incorrect because a valid antonym exists.

Common Pitfalls:
Confusing perpendicular axes: people often mix front/back with up/down or inside/outside. Always compare along the same spatial axis.

Final Answer:
front