Both of the above, is the correct answer
        
             
        
        
        
Element 
An element is a pure substance that cannot be broken down into other substances, an element is made up of only one type of atom. 
Hope this helps :) 
        
             
        
        
        
Formation of island chains occurs when convergent boundaries interact and is denoted as option A.
<h3>What is Convergent boundary?</h3>
This refers to an area where two or more lithospheric plates collide in the earth.
When the y interact, island chains are formed which consists of sea with sparse islands around the area.
Read more about island chains here brainly.com/question/12433780
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Answer:
Explanation:
Based on the astronomical definition of seasons, yes, the autumnal equinox does mark the first day of fall (in the Northern Hemisphere). However, according to the meteorological definition of seasons, which is based on temperature cycles and the Gregorian calendar, the first day of fall is September 1. 
stole this from g**gle, but it explains it farily well. Autumnal equinox is the turning point