It is the time of the day when light first appears.

This verb means to attract or interest somebody very much. 

It means to see or notice somebody or something. 

The best match for  "to produce a dull steady light" is: 

The regular way in which something happens or is done is called: 

The huge mountains fascinate me. They are ....................

Ants walk in ............................. organized pattern.

The marine biologist ………………… the movement of the fish

Pollution has made a change in the ............................... pattern. 

At the bottom of the ocean there .............................. no light at all.