A major reason for (21) in the animal world is territory. The male animal establishes an area. The size of the area is sufficient to provide food for him, his (22) and their offspring. Migrating birds, for example, (23) up the best territory in the order of" first come, first (24) . "The late arrivals may acquire larger territories, but less food is (25) ,or they are too close to the (26) of the enemies of the species. (27) there is really insufficient food or the danger is very great, the animal will not mate. In this way, the members of the species which are less fit will not have (28) .
When there is conflict (29) territory, animals will commonly use force, or (30) of force, to decide which will stay and which will go. It is interesting to note, however, that animals seem to use the (31) amount of force necessary to drive away the (32) . There is usually no killing. In tile ca
A. offspring
B. mate
C. intruder
D. neighbor
A major reason for (21) in the animal world is territory. The male animal establishes an area. The size of the area is sufficient to provide food for him, his (22) and their offspring. Migrating birds, for example, (23) up the best territory in the order of" first come, first (24) . "The late arrivals may acquire larger territories, but less food is (25) ,or they are too close to the (26) of the enemies of the species. (27) there is really insufficient food or the danger is very great, the animal will not mate. In this way, the members of the species which are less fit will not have (28) .
When there is conflict (29) territory, animals will commonly use force, or (30) of force, to decide which will stay and which will go. It is interesting to note, however, that animals seem to use the (31) amount of force necessary to drive away the (32) . There is usually no killing. In tile ca
A. occupied
B. served
C. seated
D. manipulated
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