30. However, a from St Andrews University, Anne Magurran, has recently announced that to call piranhas cruel killers SCIENCE is not fair.

Решение:

Преобразуем слово SCIENCE в существительное, подходящее по смыслу.

1. However, a scientist from St Andrews University, Anne Magurran, has recently announced that to call piranhas cruel killers is not fair.

Ответ: scientist