A coastal area that once supported a thriving fishing industry is overfished. The number of
species found living in the marine ecosystem decreases.
Which of these activities is most likely to increase the natural biodiversity in the area?
A Building artificial reefs and limiting fishing activity
B Introducing non-native species to fill unoccupied babitats and banning fishing
C Building artificial reefs and increasing fishing activity
D Eliminating non-native species and encouraging fishing for large predatory fish

A. A Building artificial reefs and limiting fishing activity

Explanation:

Building artificial reefs will limit the overfishing and also limit decrease in number of living in the  marine ecosystem.

An artificial reef is a man made marine structure with no bottom which is used to block the passage of unwanted artificial things in the marine ecosystem such as trawling nets and  ships. So, artificial reef will block the equipment used by fishing industry, which limit their fishing activity and help the marine life to grow.

Hence, the correct option is A.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]