How is theft defined?

The definition of theft hinges on the concept of unlawfully taking someone else's property. The correct answer describes theft as obtaining control over property through deception or threat. This encapsulates the essence of various forms of theft, including fraud or extortion, where the perpetrator uses manipulation or intimidation to acquire possession of someone else's belongings. Theft is about an unlawful act where consent is absent due to the deceptive or threatening method employed.

In contrast, other options present scenarios that do not qualify as theft under the law. Obtaining property by gift implies consent; thus, it cannot be categorized as theft. Similarly, taking property without consent is a core aspect of theft, but in this context, it doesn't specifically highlight the methods of deception or threat which enhance the severity of the act. Lastly, obtaining property through legal means does not constitute theft, as it involves rightful possession or transfer of ownership. Therefore, the specific mention of deception or threat in the correct option makes it the appropriate definition of theft within the legal framework.