**Core Concept**
The Aedes mosquito is a primary vector for several tropical diseases. These diseases are transmitted through the bite of an infected female Aedes mosquito, which injects the pathogens into the bloodstream of the host.

**Why the Correct Answer is Right**
The Aedes mosquito is known to transmit diseases such as dengue fever, Zika virus infection, and chikungunya. The transmission of these diseases occurs through the bite of an infected female Aedes mosquito, which injects the virus into the bloodstream of the host. The virus then replicates within the host cells, leading to the characteristic symptoms of the disease.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Aedes mosquito does not transmit malaria. Malaria is transmitted by the bite of an infected female Anopheles mosquito.
**Option B:** This option is incorrect because Aedes mosquito does not transmit Japanese encephalitis. Japanese encephalitis is transmitted by the bite of an infected female Culex mosquito.
**Option C:** This option is incorrect because Aedes mosquito does not transmit yellow fever in most regions (some exceptions apply). Yellow fever is transmitted by the bite of an infected female Aedes mosquito.

**Clinical Pearl / High-Yield Fact**
The Aedes mosquito is a primary vector for several tropical diseases, and its control is essential in preventing the spread of these diseases. The use of insecticides, elimination of breeding sites, and use of mosquito nets are some of the measures used to control the population of Aedes mosquitoes.

**Correct Answer: D. Yellow fever**