Background: One of the main causes of extinction is introduction of exotic species into an environment. These exotic and new species can also be called invasive species or non-native species . These non-native species, being new to an area, may not have natural predators in the new habitat, which allows their populations to easily adapt and grow. Invasive species out-compete the native species for resources. Sometimes invasive species are so successful at living in a certain habitat that the native species go extinct ( Figure below ).

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species.

Question: Which country introduced more non-native species to the environment?
Answer: India

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species.

Question: Which country introduced fewer non-native species to the environment?
Answer: Singapore

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species.

Question: Which country observed that non-native species may not have natural predators in the new habitat?
Answer: India

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species.

Question: Which country didn't observe that non-native species may not have natural predators in the new habitat?
Answer: Singapore

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species.

Question: Which country didn't observe that non-native species easily adapt and grow?
Answer: Singapore

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species.

Question: Which country observed that non-native species easily adapt and grow?
Answer: India

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species. India encountered big problems with extinction during the following years.

Question: Which country observed that invasive species out-compete the native species for resources?
Answer: India

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species. India encountered big problems with extinction during the following years.

Question: Which country didn't observe that invasive species out-compete the native species for resources?
Answer: Singapore

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species. India encountered big problems with extinction during the following years.

Question: Which country had more species go extinct?
Answer: India

Situation: India decided to introduce several exotic species into their environment, while Singapore was very protective of its native species. India encountered big problems with extinction during the following years.

Question: Which country had fewer species go extinct?
Answer: Singapore