Heat fusion, i think. i dont really get question
Lithosphere is the crust and upper mantle of the earth.
A method of measuring time based on time at the prime meridian/ ... Title, legend, grid system, direction, scale ... If you wanted to draw a map for the purpose of telling time, how many degrees ...
Answer:
Protostars are difficult to observe because they are surrounded by cocoons of gas and dust.
I can’t see your pic
Sorry