Question

what did tilloo's father advise him not to try to reach the surface of the planet​

Answer 1

Tilloo's father advised him not to try to reach the surface of planet because tilloo would not be able to survive there. The air on the surface was to thin and the temperature too low for ordinary people to survive

Explanation:

Answer 2

: Required Answer

$\implies$ Tilloo’s father advised him not to try to reach the surface of the planet because the surface had very thin air, which was hard to breathe and it had a very low temperature, which Tilloo would not be able to withstand.