The feature lacking from the new smartphone model is; C: Output
We are told that the new model of smartphone only includes apps, a processor, a memory card, and a microphone.
Now, the program would be the code; the input would be the input; while the memory card would be the memory which means the output is the only thing lacking.
In conclusion, the feature lacking from the new model smartphone is output.
Read more about computer output at; https://brainly.com/question/26409104