[Solved] Strain theory is best described by: A) An individual not having medical needs satisfied. B) A person being frustrated by the environment. C) An individual not being able to have equal opportunities as others. D) An individual being lazy. Terrestrial Life: Organisms that live and thrive on land, as opposed to in water or air. Land Plants: A large group of terrestrial plants, including bryophytes, ferns, and seed plants, that are key contributors to terrestrial ecosystems and the global oxygen cycle. Megafossils: Large fossilized remains or impressions of plants or animals visible to the naked eye, used in the study of paleontology. Paleontologist: A scientist who studies fossils to understand the history of life on Earth, including the evolution of plants and animals.