Final answer:
The field that focuses on the investigation of the laws of nature is Science.
Step-by-step explanation:
The field that focuses on the investigation of the laws of nature is Science (option A). Science is a practice of learning about the natural world and includes various branches of study such as physics, chemistry, biology, geology, and astronomy. These branches of science use mathematics and logic to observe, experiment, and discover accurate facts, scientific laws, and theories about the natural world.