Ecosystems are networks where living things connect with their environment.The
ocean,covering 71% of the earth's 1 ,is the largest ecosystem.It produces most of
the planet's oxygen through tiny plants.However,human activities like fishing and
pollution have 2 its balance.
Wetlands,though small,play a(n) 3 role.They act like sponges during
rains, 4 floodwaters and cleaning pollution.Sadly,many wetlands have been lost
due to farming and urbanization(城市化).
Forests,called the earth's “ lungs ", 5 carbon dioxide and give out oxygen.
Rainforests,home to many animals,are becoming smaller.Cutting down trees and fires
destroy them.If this continues,some animals may 6 forever.
Even deserts, 7 it is dry,are ecosystems.Desert p ll ants store water r in leaves,
while animals like camels 8 heat t.Climate change makes deserts hotter,threatening
their survival.
Polar ecosystems are also in danger.Melting ice harms polar bears and penguins,
9 need ice to hunt.Scientists say if temperatures rise,these places may change
10 .
Protecting ecosystems needs everyone.Governments should make laws to stop
pollution.People can help by using less plastic and 11 eco-friendly products.
Teaching kids about nature helps them 12 good choices later.
Small actions matter.By working together,we can bring 13 between humans
and nature,saving all living 14 .Remember:protecting ecosystems means
protecting 15 .
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