Correct option is A
Explanation-
Option A - "Niche breadth tends to increase with interspecific competition while intraspecific competition tends to decrease it."
Incorrect
This is not universally correct. In fact, intraspecific competition often leads to an increase in niche breadth, as individuals diversify to reduce competition within the species. Conversely, interspecific competition usually leads to niche narrowing due to competitive exclusion and specialization to avoid overlap with other species.
Option B - "Species in unstable environments with fluctuating resource availabilities tend to have broad niche breadths."
Correct
Unstable environments favor generalists with broad niches who can survive variable conditions.
Option C - "K-strategists are likely to be better competitors than r-strategists in a climax community."
Correct
K-strategists thrive in stable environments with high competition (e.g., climax communities), where being a good competitor matters more than fast reproduction.
Option D - "Diffuse competition increases with niche dimensionality."
Correct
More dimensions in resource use (e.g., time, space, diet) increase the potential for diffuse interactions across species.
Correct Answer -
Option A is the only incorrect statement which makes it a correct answer
