The author explains Andrew Jackson was "nicknamed ‘Old Hickory' because of his toughness." The word tough can mean strong and resilient. It can also mean harsh and severe. Explain whether one of these definitions or both of these definitions accurately describe Andrew Jackson. Use information from the text to support your answer.

Spider crabs live in the shallow regions of the ocean floor. algae tend to grow on the surface of spider crabs. the algae provide the crabs protection from predators by camouflaging them. the spider crabs give the algae shelter. what does this description suggest? 1. the algae are parasites of the spider crabs. 2. the algae and the spider crabs have a mutualistic relationship. 3. the spider crabs are commensals, and the algae are parasites. 4. the spider crabs benefit from the algae living on them. 5. the spider crabs are parasites of the algae.