Read the passage and answer: The honeybee is one of nature's most important pollinators. As bees travel from flower to flower collecting nectar, they transfer pollen between plants, enabling fruit and seed production. Without honeybees, many crops humans depend on — almonds, apples, blueberries, and dozens of others — would produce dramatically lower yields. Recent declines in bee populations have raised serious concerns about food security worldwide. What is the main idea of this passage?

The main idea is the central message the passage communicates. Strategy: identify the topic (what the passage is about), then identify what the passage SAYS about that topic. Here the topic is honeybees; what the passage says is that they're crucial pollinators for crops, and their decline threatens food security. Distractor analysis: 'Bees make honey' is true but not what this passage discusses; 'Almonds and apples grow on trees' is true but tangential — it's a detail to support the main point; 'Bees fly between flowers' is a supporting detail describing the mechanism. The main idea typically: (1) covers the entire passage, not just part; (2) is supported by details in the passage; (3) is broader than specific facts. Sometimes stated explicitly (often in first or last sentence); sometimes implied across multiple sentences. Read the first and last sentences carefully — main idea is often there.