When can a scientific theory be changed? a) when new technology is developed b) after another scientist does an experiment c) never; once it is a law or theory it is impossible to change d) after many experiments and much more data had been collected

D: After many experiments and much more data has been collected.

The correct answer will be option-D.

Explanation:

A scientific theory is a well-substantiated idea which explains any natural phenomenon occurring in nature.

The theory is a result of the continuous experiments which tries to explain any scientific hypothesis. The scientific theory in a scientific method can evolve as they can be improved, modified and rejected due to more information collected with time.

Thus, option-D is the correct answer.

Invasive species is the correct answer. They are the nuisance causing species, which grow abruptly and cause damage to the local organisms of the area. They harm the human health, economy, as well as environment.