Which geological features most likely prompted the development of the theory of plate tectonics?
a) river deltas
b) glacier fields
c) mountain ranges
d) tropical rainforests

c.mountain ranges

Explanation:

scientists wondered how they where formed and came to the conclusion that they might be forced upward by movement of the earths crust

mountain ranges

Explanation:

The world's tallest mountain ranges form when pieces of Earth's crust—called plates—smash against each other in a process called plate tectonics, and buckle up like the hood of a car in a head-on collision.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e