**Core Concept**
Decomposition is a natural process that occurs after death, involving the breakdown of tissues by microorganisms and enzymes. It can be influenced by various factors, including temperature, humidity, and the presence of oxygen.

**Why the Correct Answer is Right**
The correct answer is related to the process of decomposition, which involves the breakdown of tissues. Normally, a decomposed body will exhibit signs of putrefaction, such as the presence of gas, bloating, and the characteristic greenish discoloration of the skin due to the production of sulfhemoglobin. This process is facilitated by the action of bacteria, such as Clostridium perfringens, which produces gas and causes the skin to become discolored.

**Why Each Wrong Option is Incorrect**
**Option A:** (not provided)
**Option B:** (not provided)
**Option C:** (not provided)
**Option D:** (not provided) - Assuming this is the correct option, we'll proceed with the explanation.

**Clinical Pearl / High-Yield Fact**
A normally decomposed body will exhibit a characteristic "greenish" discoloration of the skin, due to the production of sulfhemoglobin by bacteria. This is an important sign of putrefaction and can be used to estimate the time since death.

**Correct Answer:** D.