The correct answer is a) Acidic.
Forest soils in Kerala are generally acidic due to the presence of organic matter, which is a natural acid. The organic matter in forest soils comes from the decomposition of plant and animal matter. The decomposition process releases acids into the soil, which lower the pH of the soil.
Alkaline soils are soils that have a pH of 7 or higher. Alkaline soils are often found in areas with a lot of limestone or chalk. Limestone and chalk are both alkaline minerals that can raise the pH of the soil.
Neutral soils are soils that have a pH of 7. Neutral soils are not acidic or alkaline. They are the most common type of soil in the world.
Saline soils are soils that have a high concentration of salt. Salt can come from the natural environment, such as seawater, or it can be added to the soil by human activities, such as irrigation with saline water. Saline soils can be harmful to plants, as they can interfere with the uptake of water and nutrients.
In conclusion, forest soils in Kerala are generally acidic due to the presence of organic matter.