Syntax is also collectively known the arrangement of words in a sentence. The correct answer to your questino is B. For that reason it isn't possible for any other answer in this case to be correct because B actually denotes a rather formal way of how you could talk about syntax.
I believe the polysaccharide that provides rigidity and strength in plants would be cellulose. As this is one of the essential components found in the cell wall of plant cells.
Gymnosperms do not have fruits or flowers and have an unenclosed or naked seeds on the surface of scales or leaves while Angiosperms have seeds that are enclosed within an ovary which is usually a fruit.
False. Offspring could die off from many factors such as disease, lack of food, and predators.