pls help im on my english final and i want to make sure this is right before i submit it!!!!


Leaves


At a glance, leaves appear quite simple. However, their complex organic structure and the multiple processes that take place within them are astonishing. Leaves consist of millions of tiny cells that are shaped like balloons, which are known as chloroplasts. These chloroplasts are filled with a gel-like substance known as chlorophyll. Chlorophyll imparts a lovely green hue to the leaves. One of the main functions of leaves is the absorption of the carbon dioxide that plants need from the air. This gas is absorbed into the leaves through small openings known as the stomata. The cells in the leaves then convert the carbon dioxide into sugar molecules for the plant's use. For plants, oxygen is a waste product, so during the conversion the leaves will expire oxygen. Leaves constantly absorb sunlight, carbon dioxide and water from different sources to create food for the plant. This process is known as photosynthesis.


3

Select the correct text in the passage.

Which definition fits the use of expire as it is used in the passage?

Expire /ĭk-spīr′/ verb

1. to come to an end

2. to die

3. to give something off

4. to become invalid