Question

1. all living things depend on the organic molecules synthesised by plants as a result of ______.

Explanation:

The question is about the process by which plants synthesize organic molecules that all living things depend on. In biology (a subfield of Natural Science), plants produce organic molecules (like glucose) through photosynthesis. Photosynthesis uses light energy, carbon dioxide, and water to create glucose and oxygen. So the blank should be filled with "photosynthesis" as it's the process where plants make organic molecules essential for life.

Answer:

photosynthesis