Step 1: Understand the meaning of “Enormous.”
The word “enormous” means very large in size, quantity, or degree—synonyms include huge, massive, immense, gigantic.
Step 2: Identify the exact opposite.
The antonym must convey the idea of being very small in size or scale. Among the given options, only “Tiny” directly expresses the opposite of “Enormous.”
Step 3: Eliminate incorrect options.
- “Soft” refers to texture, not size—irrelevant.
- “Average” means moderate or typical, not necessarily opposite to large.
- “Weak” refers to strength, not size.
Thus, “Tiny” perfectly matches the requirement of being the exact opposite of “Enormous.”
\[
\boxed{\text{(c) Tiny}}
\]