Answered Read the passage.
62.
Cooperative Trees
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We often think of trees as simple objects that provide us with things we need, such as
lumber, shade, or fruit. Yet trees are far more complex-and social--than we recognize.
An underground network of fungi, which some have called the "wood-wide web,
connects the roots of numerous trees in a forest. Using the network, trees can
communicate with and support one another. They may share water, carbon, nutrients,
and protective compounds with one another. Scientists believe that one explanation for
this phenomenon may be a "source-sink model." According to this theory, trees growing
in excellent conditions with many resources transfer these resources to trees growing in
less favorable conditions. In this way, trees in a forest ensure the health of the entire
community by working cooperatively,
What is the main idea of the passage?
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84
91
The wood-wide web is an underground fungal network of connections between
trees.
Trees in a forest work to support one another by using an underground fungal
network
Different parts of a forest may provide different conditions for trees, some
more and some less favorable for growth.