which statement explains one way that lakes form?\n○ lava flows block a river.\n○ streams flow into shallow…

Brief Explanations:

To determine how lakes form, we analyze each option:

• "Lava flows block a river": When lava flows (from volcanic activity) block a river, the river's water can accumulate behind the lava dam, forming a lake (e.g., crater lakes or lava - dammed lakes). This is a valid geological process for lake formation.
• "Streams flow into shallow areas": Streams flowing into shallow areas typically form wetlands or marshes, not lakes. Lakes require a depression that can hold a significant volume of water, and just shallow areas with stream inflow don't necessarily form lakes.
• "Groundwater feeds into low - lying areas": Groundwater feeding into low - lying areas usually forms springs or wetlands. For a lake, there needs to be a larger - scale accumulation of water, and groundwater alone feeding into low - lying areas is not the primary way most lakes form.
• "Grassy wetlands get covered by a stream": Covering grassy wetlands with a stream would just be a change in the wetland's hydrology, not the formation of a lake. Wetlands and lakes have different characteristics, and this process doesn't create a lake.

Answer:

A. Lava flows block a river.