Why, because, the reason why

________ are they using these strong pesticides?

• Why

• Because

• Because of

I really don’t know __________all these species are dying.

• why

• because

• because of

I’m not swimming in this river _______________ the water is awfully polluted.

• why

• because

• because of

Chinese use bugs to complement their diet ___________ their nutritious properties.

• why

• because

• because of

We need to understand ____________ those species are changing their habits.

• why

• because

• because of

Animals stay away from owls, ____________ they are fierce predators.

• why

• because

• because of

Insects have very small brains, this is the reason ____________ they behave mostly by instinct.

• why

• because

• because of

__________________ sushi is prepared with uncooked meat, many people thought it was strange at first.

• Why

• Because

• Because of