When viral dna combines with the host cell's dna, the viral dna becomes a

Prophage

Explanation:

Prophage is a viral genome (e.g. bacterihage genome) which is inserted into host genome (e.g. bacterial genome). Such integrated genome-prophage is in its latent phase, because there is no lysis or disruption of host cell. After the latent period, prophage induction occurs in which viral replication begins.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: