The bar chart below shows numbers of seals, whales and dolphins recorded in the Gormez Straits from 2006 to 2018.

The chart given illustrates the

population

of three mammals in the Gormez Straits:

seals

,

whales

, and dolphins, from 2006 to 2018 in a quadrennial period.

Overall

, the

number

of species

population

for dolphins kept increasing every

four

years

, compared to the other two mammals where the

population

rates were fluctuating.

Firstly

, the

number

of dolphins in 2006 only reached almost 20. The

number

raised every quadrennial to approximately more than 20 in 2010, roughly more than 30 in 2014, and elevated into more than half of the

population

in 2006 to around 50 in 2018.

In contrast

to the other creatures, dolphins’

population

rates increased steadily

while

seals

and

whales

’ growth went

fluctuate

Wrong verb form

fluctuated

show examples

. In 2006, roughly more than 40 of the

seals

existed in Gormez Straits

while

the

number

of

whales

only reached approximately half of it. In 2010, the

population

of

seals

went south to half of the

number

in the previous

four

years

but the whale

population

increased a little to almost 30. In the next

four

years

, the seal

population

rose to more than 30,

meanwhile

Add a comma

,meanwhile

show examples

there were only roughly 20

whales

in 2014.

Four

years

later, the growth of

seals

jumped up to more than 40 and followed by

whales

to almost 30 in 2018.