Final answer:
Oxisols are very highly weathered soils found primarily in tropical regions. They have low fertility, a red or yellowish color, and high phosphorus retention. option a is answer
Step-by-step explanation:
The subject of this question is Geography. The question is asking about a type of soil found primarily in tropical regions. The options provided are Oxisols, Alfisols, Ultisols, and Spodosols. The correct answer is Oxisols.
Oxisols are very highly weathered soils that have extremely low fertility and low cation exchange capacity. They are characterized by a red or yellowish color and a high concentration of iron and aluminum oxide minerals, which results in high phosphorus retention. Oxisols also have few soluble minerals. option a is answer