___________ many trees lose their leaves in winter, they stand bare through the cold months.

A gorilla watched us closely ___________ he made no move.

Although they wore insect ________ they were badly bitten.

After breakfast ________ hiked ten miles to the waterfalls.

Our expedition was exhausting, or it was exciting.

Because ivory is in great demand elephants are killed illegally.

It is illegal to hunt elephants, but poachers does respect laws.

Although its population becomes too small, a species cannot reproduce successfully.

Then its becomes extinct, or it exists only in zoos.