Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions.

Efforts to save endangered species from extinction are important in preserving the delicate balance of our ecosystems. Conservationists and scientists work tirelessly to identify species that are at risk and implement strategies to protect them. One of the key approaches involves creating protected areas and habitats where vulnerable species can thrive without the threat of human interference. These areas provide safe places for endangered animals and plants to reproduce and recover their populations.

Moreover, conservation efforts often involve breeding programmes aimed at increasing the numbers of endangered species in captivity. These programmes carefully select individuals with the goal of maintaining genetic diversity and resilience within populations. Also, they aim to prevent extinction threats among endangered populations.

Additionally, public awareness campaigns play a vital role in conserving endangered species. Educating communities about the importance of protecting biodiversity fosters a sense of responsibility and encourages individuals to take action to preserve the natural world for future generations.

Firstly, it allows them to (21) ______ themselves freely in ways that may not be feasible in offline settings.