How did other animals survive the asteroid but Dinosaurs didn't?

Answer 1

Because most animals now were just cells at the time, or water animals and have eventually evolved into what we have today.

They were also reptilians i.e coldblooded, and needed the sun for warmth and energy. Hence the asteroid struck and no sun for hundreds of years due to all the dust in the atmosphere. no more dinosaurs.

+++

The survivors were animals that could cope with the world-wide climate-change that killed off most of the dinosaurs. These were largely fish, insects, mammals, enough reptiles to keep the family going, and early forms of the birds. The birds evolved from certain dinosaur lines.

There is a theory that the asteroid impact's effects were augmented by those of contemporary, very large-scale volcanism, particularly that which formed the Deccan Trappes along the W coast of India.