**Core Concept**
Gustafson's parameters are used to estimate the age of a tooth based on its anatomical changes. This is an important concept in forensic dentistry, as it helps in identifying human remains. The parameters include root resorption, tooth wear, cementum apposition, cementum transparency, enamel translucency, and root length.

**Why the Correct Answer is Right**
The most accurate Gustafson's parameter is cementum apposition. Cementum is a bone-like tissue covering the root of a tooth, and its thickness increases with age. This process, known as cementum apposition, is a reliable indicator of a tooth's age, as it occurs consistently and predictably over time. The rate of cementum apposition is relatively constant, making it a more accurate parameter for age estimation compared to others.

**Why Each Wrong Option is Incorrect**
**Option A:** Root resorption is a parameter that can be affected by various factors, including periodontal disease and orthodontic treatment, making it less reliable for age estimation.

**Option B:** Tooth wear is influenced by factors such as diet, oral hygiene, and toothbrushing habits, which can vary significantly among individuals, making it a less accurate parameter.

**Option C:** Enamel translucency is a parameter that can be affected by various factors, including caries and fluorosis, which can lead to inaccurate age estimation.

**Clinical Pearl / High-Yield Fact**
When using Gustafson's parameters for age estimation, it's essential to consider the individual's overall health, diet, and oral hygiene habits, as these factors can influence the rate and extent of anatomical changes.

**Correct Answer: C. Cementum apposition.**