Nhận biết (M1)

Most bird species that are capable of flight weigh less than a kilogram (kg), which is not surprising considering the burden that extra body weight puts on a flying animal. But not all flying birds are so light, as we can see most clearly in the example of the __________

Which choice most effectively uses data from the table to complete the example?

• A.

  northern cassowary, which has an average mass of 44.0 kg.

• B.

  Andean condor, which has an average mass below 10 kg.

• C.

  northern cassowary, which has a higher average mass than the lesser rhea.

• D.

  Dalmatian pelican, which has an average mass of 11.5 kg.