The ideas that Darwin developed from malthus and lyllel?

Darwin drew significant inspiration from Thomas Malthus's idea of population pressure, which suggested that populations tend to grow faster than their resources can support, leading to competition for survival. He also incorporated Charles Lyell's principles of gradual geological change over time, which helped him understand that the Earth was much older than previously thought, allowing ample time for evolution to occur. Together, these concepts informed Darwin's theory of natural selection, where individuals better adapted to their environment are more likely to survive and reproduce.