Question

-------use plants directly as their food .​

Answer 1

Answer:

Photosynthesis.

Explanation:

$why$

Plants make their own food by a process called Photosynthesis. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy and stored in the form of starch which can be used later. ... Photosynthesis is done with the help of carbon-dioxide, water, and sunlight

Answer 2

Their roots take up water and minerals from the ground and their leaves absorb a gas called carbon dioxide (CO2) from the air. They convert these ingredients into food by using energy from sunlight. This process is called photosynthesis, which means 'making out of light'. The foods are called glucose and starch.

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