Answer:
speed=distance÷time
2m/s,1.5m/s,1.25m/s,0.5m/s
Explanation:
20/10=2m/s
30/20=1.5m/s
50/40=1.25m/s
30/60=0.5m/s
population
a
b
B. Liquid water flowed on its surface
D. Columnar
Hint the root word is in the option and it is actually shaped like a column according to Epithelium - Wikipedia
Hope this helps : )
