Give evidence that leaves are external structures

Woody plants have a tough, waterproof outer layer of cork cells commonly known as bark, They provide structural support, mainly to the stem and leaves.

They are external structures because their veins are on the outside.

Explanation:

you can see the Leaf's vains because it's an external structure. if you can't see the Leaf's vains it means its internal

answer: i say it foxes

explanation:

you need to give us the answer options to for me to offical decide.

it creates acid rain