Answer:
in an aggregate production function when the amount of human capital per worker and the state of technology are held fixed, each successive increase in the amount of physical capital per worker leads to a smaller increase in productivity; also referred to as diminishing marginal productivity of (physical) capital
Explanation:
hope this helps
I'd say it would be speaker 4 since it mentions a specific interest like you said
<span>The answer is "ideas of reference".
Ideas of reference depict the wonder of a person's encountering harmless occasions or unimportant coincidences and trusting they have solid individual significance. It is "the idea that all that one sees on the planet identifies with one's own particular predetermination", as a rule in a contrary and threatening manner. This isn't to be mistaken for gaslighting.
</span>