Answer is: 7. Lewis base. Nitrogen trifluoride (NF₃) <span>a Lewis base, because it can donate its </span>lone pair<span> of electrons (lone pair of electrons are in nitrogen atom). </span>Lewis base <span>is any species that has a filled orbital containing an </span>electron pair<span> which is not involved in </span>bonding<span> but may form a dative bond with a Lewis acid. </span>Nitrogen-fluorine<span> compound is a colorless, odorless and nonflammable gas.</span><span>
D. PET plastics, also known as type 1 plastics, are most commonly used for single-use bottles.
The question is asking for the best "specific words". Therefore, D is going to be the best option. A, B, and C all work, but none can be described as "specific". They use vague words such as "about" or "has increased"
they are insectivores, as they have a diet of primarily insects. producers are organisms that make their own energy, like plants, but horned lizards get their energy from consuming other organisms, so they are not producers