**Core Concept**
The corporobasal index, also known as the corporobasal ratio, is a measure used in forensic medicine to estimate the age of skeletal remains. It is based on the proportional relationship between the corpus (shaft) and the basal (epiphyseal) ends of long bones.

**Why the Correct Answer is Right**
The corporobasal index is calculated by measuring the length of the diaphysis (shaft) in relation to the combined length of the epiphyses (ends) of a long bone, usually the femur. This ratio helps to estimate the age of the individual at the time of death, as the ratio changes with age due to the gradual fusion of epiphyseal plates. The index is particularly useful in cases where other methods of age estimation are not feasible.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the corporobasal index is not used to determine the sex of skeletal remains. While some skeletal features can be used to estimate sex, the corporobasal index is not one of them.
**Option B:** This option is incorrect because the corporobasal index is not used to determine the height of an individual. While some skeletal measurements can be used to estimate height, the corporobasal index is not one of them.
**Option C:** This option is incorrect because the corporobasal index is not used to determine the cause of death. While forensic analysis can involve estimating age, sex, and other factors, the corporobasal index is specifically used for age estimation.

**Clinical Pearl / High-Yield Fact**
When estimating age from skeletal remains, it's essential to consider multiple factors and use a combination of methods to arrive at an accurate estimate. The corporobasal index is just one of several tools used in forensic anthropology to help determine the age of an individual.

**Correct Answer:** C. Determining the age of skeletal remains.