Answer:
Envelope viruses get their envelope fully during the "Budding" stage.
Step-by-step explanation:
The host membrane begins to wrap around the virus and form the envelope in the "envelopment" stage, but the virus is only properly enveloped at the "budding" stage. The process begins in the envelopment stage and is completed in the budding stage. Here is a diagram, you can see that the budding step is the first step where the virus is completely encased in its envelope.