Final answer:
The vertebrate forebrain subdivides into the telencephalon and the diencephalon, with the latter including structures such as the thalamus. The telencephalon develops into the cerebrum, the largest part of the brain.
Step-by-step explanation:
The vertebrate forebrain subdivides into the telencephalon and the diencephalon, which includes structures like the thalamus and the hypothalamus. The telencephalon develops into the cerebrum, which is the largest part of the human brain, constituting the cerebral cortex and subcortical structures. The diencephalon serves as a relay center between the cerebrum and the rest of the nervous system and is essential for sensory and motor signal integration as well as the control of autonomic functions.