forefront
[ˈfɔ:frʌnt]noun
to be in or at the forefront of sthg [campaign, movement] an der Spitze einer Sache (G) stehen
to be in or at the forefront of his mind im Zentrum seiner Aufmerksamkeit stehen
Complétez la séquence avec la proposition qui convient.
There is a lion and two tigers in the cage, … are very dangerous.