TRAVELING BY CAR IS ……….. TRAVELING BY CAR IS ………..

40. Traveling by car is ………..A. cheap B. very expensive C. not appreciated D. not suitable for familiesRead the following passage and mark to indicate the correct answer to each of the questions Over a period of time, many habitats change with respect to the types of plants andanimals that live there. This change is known as successionSuccession occurs because plants and animals cause a change in the environment inwhich they live. The first weeds and grasses that appear on a bare field, for example, changethe environment by shielding the soil from the direct sunlight. As these plants spread, theground surface becomes cooler and moisture, than it was originally. Thus, the environmentat the ground surface has been changed. The new surface conditions favor the sprouting ofshrubs. As shrubs grow, they kill the grasses by preventing light from reaching them andalso build up the soil in the area, in addition, they attract animals that also enhance theshrubs. They are not able to shade out oak and hickory seedlings, however, they have foundthe forest floor suitable. These seedlings grow in to large trees that eventually shade out thepines.