The lion was captured with a net. This implies that someone used a net to trap and catch the lion. The other options, such as a mouse trap, a magic word, or meat, are not suitable for capturing a lion. A mouse trap is too small and ineffective, a magic word would not physically restrain the lion, and meat alone would not be sufficient to capture the lion. Therefore, the most logical and plausible option is that the lion was captured with a net.