High temperature and high humidity are the conditions that favor decomposition.

Explanation:

Decomposition is the process by which organic matter breaks down into simpler compounds, such as carbon dioxide, water, and various nutrients. This process is facilitated by the action of decomposers, such as bacteria, fungi, and other microorganisms.

The conditions that favor decomposition are as follows:

1. High temperature:
- Decomposers are more active and efficient at higher temperatures.
- The enzymes produced by decomposers work more effectively at elevated temperatures, speeding up the decomposition process.
- Higher temperatures also accelerate the metabolic activities of decomposers, resulting in faster breakdown of organic matter.

2. High humidity:
- Moisture is essential for the growth and activity of decomposers.
- Water is required for decomposers to carry out their metabolic processes and enzymatic reactions.
- High humidity ensures that there is enough moisture available for decomposers to function optimally.

3. Role of microorganisms:
- Decomposition is primarily carried out by microorganisms, such as bacteria and fungi.
- These microorganisms require suitable environmental conditions, including high temperature and high humidity, to thrive and carry out their decomposition activities effectively.

Impact of low temperature and low humidity:

1. Low temperature:
- Low temperatures slow down the activity of decomposers.
- The metabolic processes and enzymatic reactions of decomposers are less efficient at lower temperatures.
- As a result, the decomposition process is significantly slower in colder environments.

2. Low humidity:
- Lack of moisture hampers the growth and activity of decomposers.
- Without sufficient water, decomposers cannot carry out their metabolic processes and enzymatic reactions effectively.
- Decomposition slows down or may even cease in dry conditions.

In conclusion, high temperature and high humidity provide optimal conditions for the activity of decomposers, resulting in faster decomposition of organic matter. These conditions facilitate the breakdown of complex organic compounds into simpler forms, contributing to nutrient recycling and soil fertility.