Is it true when a production function gets flatter, the marginal

Question

is IT true when a production function gets flatter, the marginal product is increasing?this question is part of production and costs

Arsalan Khan · Accepted Answer

when company production function on big scale like giant firm then that giant firm no need to add marginal products (Additional items)to grow more.

Is it true when a production function gets flatter, the marginal product is increasing?