Jawaban:

1. In the report text, there are two generic structures:

  a. Introduction: Introduces the topic of plants and their basic needs, including food, water, and air. It also mentions the interesting fact of how plants obtain their food.

  b. Body: Provides detailed information about how plants obtain food through their roots, absorption of water and minerals, transportation of nutrients to leaves, the role of chlorophyll in photosynthesis, conversion of sugar into starch, and the conversion of minerals into various edible materials.

2. The purpose of the text is to explain how plants obtain their food and the process of photosynthesis. It aims to inform readers about the unique mechanisms that plants use to survive and grow.

3. The tense used in the text is mainly present tense. This is because the text describes general facts about plants and their processes, which are true in the present as well. For example, "Plants need food, water, and air for survival," "They absorb water and minerals," "Chlorophyll in the leaves prepares the food," and "The minerals are converted by chemical processes." However, some past tense verbs are used to describe specific actions or events, such as "converted," "stored," and "taken."