Final answer:
On his voyage on the HMS Beagle ship. Charles Darwin saw fossils of giant sloths whose bones resembled statement below best explains Darwin completed an observational Investigation in this situation is c) he was able to study the natural world in and come up with a research question
Step-by-step explanation:
By making observations and collecting specimens of plants, animals, rocks, and fossils, he was able to gather evidence and develop his theory of evolution. One of the key observations Darwin made was the discovery of fossils of giant sloths, whose bones resembled those of modern-day animals, providing evidence of how organisms looked very different in the past.
By studying the diversity of life in different habitats, witnessing geological and environmental changes, and analyzing fossil records, Darwin was able to make well-supported predictions and evaluate the evidence to further understand the process of evolution. His observational investigation allowed him to gather data and formulate hypotheses, which eventually led to the development of his theory of evolution by natural selection. The correct answer is c) he was able to study the natural world in and come up with a research question