Final answer:
NF-kB is the transcription factor that triggers an innate immune response by entering the nucleus to stimulate transcription after being activated through phosphorylation.
Step-by-step explanation:
Among the transcription factors listed, NF-kB is known to trigger an innate immune response. Phosphorylation of the inhibitor IK-B leads to its dissociation from NF-kB. This event allows NF-kB to enter the nucleus to stimulate transcription of genes involved in the immune response. NF-kB is not a kinase itself, but rather a transcription factor that is activated through phosphorylation. Upon activation, NF-kB binds to DNA and promotes the production of proteins necessary for the innate immune system to function effectively against pathogens like bacteria and viruses.