If you have choices, it would be really helpful if you'd include them with your question, but I'd say
More than half of the forests in the Czech Republic have been destroyed by pollution.
A student buries an ice cube in a pan of dirt and observes the dirt as the ice cube melts. This activity is a model of the formation of a kettle.
Cliffs will form due to weathering.
The answer is B.
There are 28 days in February. 28 in Spanish is 'veinticinco' and therefore B. is the correct answer.
