Pheretima:
- Pheretima is a common earthworm found in soil. It belongs to the class Clitellata and the phylum Annelida.
- It is a hermaphrodite, meaning it has both male and female reproductive organs.
- The body of Pheretima is segmented and consists of several structures that perform different functions.

Segments of Pheretima:
- The body of Pheretima is divided into several segments. Each segment has a specific set of structures that are responsible for various functions.

Segments 7 and 9:
- In the case of Pheretima, segments 7 and 9 have specific structures that are unique to them.

Lateral Hearts:
- The correct answer is option 'B' - Lateral Hearts. Lateral hearts are found in segments 7 and 9 of Pheretima.
- These hearts are part of the circulatory system of the earthworm.
- Pheretima has a closed circulatory system, meaning that the blood flows in vessels and does not directly come into contact with the body tissues.
- The lateral hearts help in pumping the blood through the blood vessels and maintaining circulation throughout the body.
- These hearts are located on the sides of the body wall, hence the name "lateral" hearts.

Other Structures:
- The other structures mentioned in the options are not found in segments 7 and 9 of Pheretima.
- Pharyngeal nephridia (option 'A') are located in segments 4 to 6 and are involved in excretion and osmoregulation.
- Spermatheca (option 'C') is a structure found in segments 9 to 12 of female earthworms and is responsible for storing sperm received during mating.
- Lateral Oesophageal Hearts (option 'D') are found in segments 10 to 12 and are involved in pumping blood to the anterior part of the body.

Conclusion:
- In conclusion, the correct structure found in segments 7 and 9 of Pheretima is the lateral hearts. These hearts play a crucial role in maintaining circulation in the earthworm's body.