Question

1. since 1959, more countries have joined the agreement, and its objectives have been expanded. while the initial document focused on research and keeping the peace, later documents covered the protection of marine life in and around antarctica.
2. in 1991 another agreement reinforced the original intent of the treaty while adding that activities such as mining, drilling, and exploration of minerals would be banned indefinitely. combined, these additional documents now make up the antarctic treaty, and 54 nations have signed the agreement. but new concerns need to be addressed, including the increased presence of humans in this once untouched wilderness.
3. in the years since the antarctic treaty was signed, activities on the continent

options:

• they create a sly, ironic tone.
• they create a bitter, dejected tone.
• they create a sincere, persuasive tone.
• they create a formal, administrative tone.

Explanation:

To solve this, we analyze the tone of the text about the Antarctic Treaty. The text uses formal language related to treaties, agreements, and administrative actions (e.g., "reinforced the original intent", "banned indefinitely", "54 nations have signed"). It's not sly/ironic, bitter/dejected, or overly persuasive (it's stating facts about the treaty's development). The formal, administrative tone fits as it deals with official, legal/administrative aspects of the treaty.

The text discusses the Antarctic Treaty's development, using formal, official language about agreements, bans, and administrative actions (e.g., treaty terms, nation signings). This aligns with a formal, administrative tone (not sly, bitter, or overly persuasive).

Answer:

They create a formal, administrative tone.