What kind of change causes iron to rust

it would be oxidation

Explanation:

when water combines with air and has contact with iron. it rusts over a short period of time. there fore Oxdiation.

Moisture around the iron's surroundings can cause the iron to rust

Explanation:

Rust is the oxidized form of iron. Iron rusts because it combines with oxygen. The oxygen needs moisture as a catalyst and reactant to accelerate the reaction, so in the absence of moisture, iron won't rust. So the thing that causes iron to rust is the presence of water or moisture from which the iron can take the oxygen it wants

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.  

a. to encourage apoptosis