Final answer:
True, Homo sapiens are a geologically young species, first appearing about 300,000 years ago. Every person is connected by a continuous lineage dating back at least 3.5 billion years. Our species has survived near-extinction events and now numbers over 7.6 billion globally.
Step-by-step explanation:
True, Homo sapiens are indeed a very young species in geological terms. Homo sapiens emerged approximately 300,000 years ago, with the oldest known fossils discovered in Morocco dating to that period. Despite our species' relatively recent appearance on the evolutionary timeline, every living person today is indeed the product of an unbroken chain of reproductive events spanning back to the origins of life, estimated to be at least 3.5 billion years ago.
The 'Out of Africa' model is the most accepted theory regarding human expansion, suggesting Homo sapiens first evolved in Africa around 200,000 years ago before migrating out and populating the rest of the world. Our species has undergone various challenges, including near-extinction events, but has nonetheless survived and flourished to a current population of over 7.6 billion people.
Our remarkable adaptation skills, mastery of fire, development of hunting tools, and usage of animal skins made it possible for Homo sapiens to thrive in diverse climates, giving rise to the widespread global presence we observe today.