Question

Origin of life took place in/on
(a) Water
(b) Air
(c) Mountains
(d) Land

Answer 1

Over successive generations, evolution is defined as a change in the heritable characteristics of biological populations. These traits are the expressions of genes that are passed down from one generation to the next during reproduction.

Complete answer:
Abiogenesis, also known as the origin of life (OoL) in evolutionary biology, is the natural process by which life emerges from non-living matter such as simple organic compounds. While the exact details of this process are unknown, the current scientific consensus is that the transition from non-living to living entities was a multi-step evolutionary process involving molecular self-replication, self-assembly, autocatalysis, and the emergence of cell membranes.
It is widely assumed that life originated in water. Oparin, a Russian scientist, and Haldane, a British scientist, were the first to propose this theory. Haldane described the primordial ocean as a "hot dilute soup" in which organic molecules evolved.
Although scientists agree that abiogenesis occurs, the mechanisms by which it occurs are poorly understood. Abiogenesis can be explained using a variety of principles and hypotheses. The goal of abiogenesis research is to figure out how pre-life chemical reactions gave rise to life in conditions that are vastly different from those found on Earth today.

Thus, the answer is option A: Water.

Note: The origin of life on Earth is a scientific question that has yet to be answered. There are a lot of ideas, but there aren't many facts. Most scientists agree that all modern life evolved from a single primitive lifeform.