liig
transmitted by DNA but is acquired through social
20 learning, so it can be called a "culture."
Since tool use requires a high level of intelligence
and cognitive ability, it was originally thought to be a'
skill possessed only by humans. Recently, however, tool
use by animals, including primates, birds and elephants,
25 has been observed in many places around the world.
Animals also use tools to accomplish tasks or make
them easier.
2.
How do
acquire
RS2.
1.23 how
を対照し
3.
Why do
tools?