I will be glad to insert colons and/or parentheses into each of the sentences below, please provide them.
High blood pressure can damage your arteries by making them less elastic, which decreases the flow of blood and oxygen to your heart and leads to heart disease. In addition, decreased blood flow to the heart can cause: Chest pain, also called angina.
You seem to forget including the choices in this question. Nevertheless, to help you, I could just tell what a superlative is so you could identify it on your own.
Superlatives are adjectives that are expressed in their greatest extent. For example, when you describe something so beautiful than any other thing you've ever seen, you describe it as 'most beautiful'. Another example is, if you've never been so happy in your life, you are the 'happiest'. So, generally, superlatives are written as a suffix -est or you add the word 'most' before the adjective.
Answer:
1. Mosquitoes are spreading dengue fever in Malaysia. -- Street lamps are helping to fight the disease.
2. Mosquitoes are spreading malaria in Ghana, Kenya and Malawi --- A vaccine is helping to fight the disease.
3. Mosquitoes are spreading the Zika virus in Brazil -- Genetically modified mosquitoes are helping to fight the disease.