Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Abstract description | Concrete example |
| --- | --- |
| different plants have different life spans | apple trees can live for many years but bean plants usually live for only a few months |
| plants depend on other plants | shade-loving plants such as leafy greens and squash depend on taller vegetables such as corn to provide shade |
| plants produce many offspring | one pigweed plant can produce half a million seeds |
| seasonal changes help plants grow | day length changes initiate growth and flowering and also let the plant know when to start to prepare for winter dormancy |
Question:
One pigweed plant producing half a million seeds is a concrete example of what? Select the correct choice to answer the question or fill in the blank.
Choices:
(A) seasonal changes help plants grow
(B) plants produce many offspring
(C) different plants have different life spans
(D) plants depend on other plants
Answer:
(B) plants produce many offspring