**Core Concept**
Asteroid bodies and cigar-shaped globi are types of fungal structures produced by certain species of fungi. These structures are typically associated with fungal infections and are formed through a process involving the growth and branching of fungal hyphae.

**Why the Correct Answer is Right**
The correct answer is **B. Sporothrix**. Sporothrix schenckii is a dimorphic fungus that causes sporotrichosis, a skin infection that typically occurs after exposure to contaminated soil or plant material. The fungus produces cigar-shaped or bullet-shaped structures called cigar-shaped globi or asteroid bodies, which are characteristic of sporotrichosis. These structures are formed through the growth and branching of the fungal hyphae, which become packed with pigment, resulting in the characteristic cigar-shaped or asteroid-shaped appearance.

**Why Each Wrong Option is Incorrect**
**Option A:** Sporothrix is the correct answer, so this option is incorrect.
**Option C:** Phialophora is a type of fungus that causes phaeohyphomycosis, but it is not typically associated with the production of asteroid bodies or cigar-shaped globi.
**Option D:** Aspergillus is a type of fungus that causes aspergillosis, but it is not typically associated with the production of asteroid bodies or cigar-shaped globi.

**Clinical Pearl / High-Yield Fact**
Asteroid bodies and cigar-shaped globi are characteristic of sporotrichosis, a skin infection caused by Sporothrix schenckii. This infection typically occurs after exposure to contaminated soil or plant material, and it can be treated with antifungal medications.

**Correct Answer:** B. Sporothrix