Trees, lumber, and vascular tissue?

Question

Does anyone know the answer to these 2?

1. what type of vascular tissue is most affected by stripping the bark off trees (and therefore killing them)?

2. What type of vascular tissue is lumber made from?

Please and thank you :)

Answer 1

1. phloem

2. xylem

Answer 2

1. Cambium layer (inner Bark) only part of tree alive

2. Wood Tissue (formed from cambium layer)