Why is an oil spill devastating to ocean wildlife? A. Oil companies sometimes spill oil. B. Oil is toxic, hard to clean, and makes movement difficult for the animals. C. Wildlife in the ocean sometimes dies because of humans.

(Joel Sartore photographs many species of wildlife) because he loves nature. reason / result

What does "effect" mean? Can you tell one effect of climate change?

Why is the muskox population getting bigger? A. Because they almost became extinct in the early 20th century. B. Because they are over-hunted for fur and meat. C. Because hunters are restricted from over-hunting the species.

I never walk in the woods (because I do not enjoy nature). reason / result

My husband and I _____ (go) on a day trip to the mountains.

Why are many animal species losing their homes and food? A. Because people are building on their habitats. B. They are in danger of extinction. C. Because people are eating their food.

Why is the chimpanzee population falling? A. The number of chimpanzees has dropped since the 1970s. B. Chimpanzees live in Equatorial Africa. C. Chimpanzees are losing their homes.

What does "ambition" mean? Do you have any ambitions in your life?

Since sea turtles' bodies are filled with toxins, (it is dangerous to eat them). reason / result

What does "predict" mean? What do you predict the weather will be like in 20 years?

What does "challenge" mean? What challenges do you have in learning a new skill?

We ______ (have) a hard time climbing the mountain.