Directions: Read the following passage and answer questions 1 to 4.

How does the author support the claim that trees use their network for "safety"? Use two specific details from the text to support your answer.

Which statement best expresses the central idea of the passage.
What does the word "altruistic" mean as it used in paragraph 2?
In paragraph 4, what evidence does the author provide to support the point that trees are more than just individuals competing for space?