Questions: Product testing ensures that a product meets its specifications in a variety of environments determined by the company.

The answer is the first one: Product testing.

Explanation for each option:

1. Product testing: This is the correct answer. Product testing involves evaluating a product to ensure it meets the required specifications and performs well in various environments. It is a comprehensive process that assesses the product's functionality, durability, and safety under different conditions.

2. Primary testing: This term is not commonly used in the context of product development and testing. It does not specifically refer to ensuring a product meets specifications in various environments.

3. Concept testing: This is a process used early in the product development cycle to evaluate consumer response to a product idea before it is developed. It does not involve testing the product in different environments.

4. Beta testing: This is a phase of testing where a nearly complete product is released to a limited audience outside the company to identify any remaining issues. While it involves real-world testing, it is not specifically focused on ensuring the product meets specifications in various environments.

5. Alpha testing: This is an internal testing phase conducted by the company before beta testing. It is primarily focused on identifying bugs and issues but does not specifically ensure the product meets specifications in various environments.

In summary, product testing is the process that ensures a product meets its specifications in a variety of environments.