Use "call of nature" in a sentence

1. The next question is, how do you answer the call of nature at minus 40?

2. Call off, call of nature, call on, call one's own, call on the carpet, Callop, callosal, callosal gyrus, callose, callosity, Callot Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc

3. "When the passenger was Alighting, the driver alighted too to answer a call of nature, but the gang attacked and took control of the vehicle," Lari deputy police subcounty commander Musa Omari said