Answer:

Introduction:
A good house is essential for a comfortable and healthy living environment. It should fulfill certain criteria to provide a pleasant and safe space for its occupants. The options provided in the question suggest various features that contribute to a good house. Let's analyze each option to determine which one(s) are true.

Analysis:
a) A good house should have plenty of fresh air and sunshine:
Fresh air and sunshine are crucial elements for a healthy living environment. Fresh air helps to circulate oxygen and remove pollutants, while sunshine provides natural light and warmth. Both of these factors contribute to the physical and mental well-being of the occupants. Therefore, having plenty of fresh air and sunshine is indeed a desirable feature of a good house.

b) All of these:
This option suggests that all the given features are true for a good house. Let's analyze the remaining options to confirm its accuracy.

c) A good house should be neat and clean:
Maintaining cleanliness and tidiness is essential for a good house. A neat and clean house promotes good hygiene, reduces the risk of diseases, and creates a pleasant living environment. Regular cleaning and organizing are necessary to keep the house in optimal condition.

d) A good house should have trees nearby:
Having trees nearby a house can have several benefits. Trees provide shade, improve air quality, and contribute to the aesthetic appeal of the surroundings. Additionally, they can provide a sense of tranquility and privacy. However, the presence of trees nearby is not an absolute requirement for a good house, as this may vary based on personal preferences and the location of the house.

Conclusion:
After analyzing the given options, it is evident that option 'b' is correct. A good house should have plenty of fresh air and sunshine, be neat and clean, and may or may not have trees nearby. These features collectively contribute to a comfortable, healthy, and pleasant living environment.