1.What is the Product Variant of Weight onShopify?
A product variant is a different version of a product, such as differing sizes or differing colors.
Without product variants, you would have to treat the small, medium and large versions of a t-shirt as three separate products; product variants let you treat the small, medium and large versions of a t-shirt as variations of the same product.
Each product can have a maximum of 100 variants.
Product variant of weight:
The unit system that the product variant's weight is measure in. The weight_unit can be either "g", "kg, "oz", or "lb".
2.Why Adobe Stock is in Usd price?
It is just the standard using of USD price in the stock market.