Questions: Supply chain is the flow of information, materials, and services that starts with raw-materials suppliers and continues adding value through other stages in the network of firms until the product reaches the end customer.

The answer is consumer: the original text in the question...

Explanation for each option:

1. Storage: This option is incorrect because storage is a part of the supply chain process where goods are kept before they are moved to the next stage. It is not the final stage where the product reaches the end customer.

2. Consumer: This is the correct answer. The supply chain starts with raw-materials suppliers and continues through various stages, adding value until the product reaches the end customer, who is the consumer.

3. Distributor: This option is incorrect because a distributor is an intermediary in the supply chain that helps move products from manufacturers to retailers or directly to consumers. It is not the final stage.

4. IDON'T KNOWYET: This is not a valid answer option and does not provide any information relevant to the question.

5. Support: This option is incorrect because support refers to services that assist in the supply chain process, such as customer service or technical support. It is not the final stage where the product reaches the end customer.

In summary, the supply chain culminates when the product reaches the consumer, who is the end customer.