CoachA living thing is something that is alive: it is born, it feeds, it grows, it can have babies, and one day it dies. Animals and plants are living things. Biology is the science that studies them.
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Example 1.2 (The snail and the pebble)
The snail was born from a tiny egg. It eats salad leaves. It grows — its shell grows with it. There can be baby snails. So the snail is a living thing. The pebble eats nothing, grows not at all, and never has baby pebbles: the pebble is not living.
Example 1.6 (The wooden table)
A wooden table does not feed and does not grow: it is not living. But its wood once was: it comes from a tree that was born from a seed, grew for many years, and was cut down. The table is non-living — and it comes from a living thing.