What does this sentence mean?

It was a rainy season which caused the river to be swollen.

Because there's been a lot of rain, the river has more water than usual.

Thank you.

You're welcome.

The sentence means that during a specific period of time known as the rainy season, there was a significant amount of rainfall. As a result of this heavy rain, the river's water level rose significantly, making it swollen or larger than its usual size.

To understand the meaning of this sentence, it's important to analyze its individual parts:

1. "It was a rainy season": This part establishes that there was a specific season characterized by a lot of rain.

2. "which caused the river to be swollen": This part explains the consequence of the rainy season. The word "which" refers back to the rainy season mentioned earlier, indicating that the heavy rainfall during this season caused the river to become swollen.

To fully grasp the context and implications of this sentence, it may be helpful to have additional information about the location, time frame, or any specific circumstances related to the swollen river.