The following sentence has been divided into parts. One of them may contain an error. Select the part that contains the error.
In the future, humans had colonise Mars / and establish a thriving civilisation / on the red planet.

Correct option is B

The error is in "In the future, humans had colonise Mars."
Explanation:
· "In the future" refers to a future action, so "had" (past perfect) is incorrect.
· The correct verb form should be "will colonise" instead of "had colonise".
Correct Sentence:
In the future, humans will colonise Mars and establish a thriving civilisation on the red planet.
Grammatical Rule:
· Use "will" (future tense) for actions expected to happen in the future.
· "Had" is used in past perfect tense, which is incorrect here.
Incorrect Options:
· (c) and establish a thriving civilisation – No error.
· (d) on the red planet – No error.
Example:
· In the future, scientists will develop new energy sources.
· In the future, scientists had developed new energy sources.