The Who: Which member of the band played the part of "Tommy" in the movie version?

Questions

---------- are social birds that congregate in huge flocks. While the flock grazes in a field, lookouts will be posted to watch for approaching danger. They'll raise the alarm if humans approach.?

An adult walrus typically eats about 3,000 ---------- per day.?

---------- are the smallest breed of dog used for hunting. They are low to the ground, which allows them to enter and maneuver through tunnels easily.?

An ---------- can go through 2,000 to 3,000 teeth in a lifetime.?

Dead sponges can resist bacterial decay for more than five years when submerged in ----------?