Explain how weeds are a threat to crops.

Explanation

**Step-by-Step Solution:**

1. **Definition of Weeds**: Weeds are defined as unwanted plants that grow alongside crop plants. They do not have any beneficial purpose in the context of agriculture.

2. **Nutrient Competition**: Weeds compete with crop plants for essential nutrients in the soil. This competition can lead to a deficiency of nutrients for the crops, which can hinder their growth and development.

3. **Water Competition**: Similar to nutrients, weeds also compete with crops for water. This can result in reduced water availability for the crops, further stressing them and affecting their yield.

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