Hello,
1) Go to Static Blocks > edit Prefooter static block using Visual Composer http://xstore.helpscoutdocs.com/article/47-static-blocks
If you want to remove the content from Prefooter go to Appearance > Widgets > Prefooter > delete Static Block widget.
2) Geolocation is related to your server settings and it’s WooCommerce plugin option. It’s not related to our theme. Contact your hosting provider to solve the issue.
3) Everything depends on your product. If every tree will have different sizes then you need to create Size attribute https://docs.woocommerce.com/document/managing-product-taxonomies/#section-3 and change product type to Variable https://docs.woocommerce.com/document/variable-product/
But if you just want to add the height and show it on product page you may use Shipping tab http://prntscr.com/e7b2pw and then these dimensions appear at Additional Information tab http://prntscr.com/e7b3bv
Or just use Short Description.
Regards