From the given choices the true statement is Surface winds blow parallel to isobars. 
Answer: Option B
<u>Explanation:</u>
The winds which flow near the isobars, flow in the parallel direction of the isobars. They are not absolutely parallel to each other but are this much parallel that the purpose of the flight planning can be fulfilled with this. 
These winds flow in perpendicular position to isobars which are present at that particular surface and they flow in this direction due to the acting of the force of friction in that area. This force of friction can also change the direction and the flow of the wind.
 
        
             
        
        
        
Answer:
root wedging
Explanation:
Due the tropical climate, there will be presence of trees which will aid rooting wedging in Weathering of rocks
 
        
             
        
        
        
Answer:
3 is the difference(remainder) of $33-$30
Explanation:
Samuel has $33 
A pack of cards cost $5
The most packs Samuel can buy is 6
6*5=$30 
$33-30=3
 
        
             
        
        
        
The correct answer is - Olmec.
The Olmec civilization was existing in the period between 1,200 BC up until 400 BC. This civilization developed in Mexico, more specifically in the south-central lowlands of the country. The Olmec were a very advanced civilization for their time, and they are considered as the civilization that set the basis for all the others civilizations in Mesoamerica, like the more ''famous'' Maya and Aztec civilizations. The trademark of the Olmec is the big stone heads, about which there's lot of debates about their purpose and means.